US1656347A

US1656347A - Sizing device for surface grinders

Info

Publication number: US1656347A
Application number: US50097A
Authority: US
Inventors: John A Doane
Original assignee: Pratt and Whitney Co Inc
Current assignee: Pratt and Whitney Co Inc
Priority date: 1923-05-31
Filing date: 1925-08-13
Publication date: 1928-01-17
Anticipated expiration: 1945-01-17

Description

J. A. DOANE SIZING DEVICE FOR SURFACE GRINDERS Jan. 17, 1 928.

2 Sheets-Sheet 1 Original Filed May 1923 J. A. DOANE sxzme DEVICE FOR sqnmcn snmmsas Jan. 17, 1928.

2 Sheets-Shut 2 IIll/EIITUR By W ATTORNEY Original Filed May 1923 l UU MW MHWHHMH Patented Jan. 17, 1928.

UNITED STATES I 1,656,347 PATENT OFFICE.

JOHN A. DOANE, WEST HARTFORD, CONNECTICUT, ASSIGNOB TO PRATT & WHI'I- NEY COMPANY, 0! NEW YORK, N. Y., A CORPORATION OF NEW JRSEY.

SIZING DEVICE FOB SURFACE GBINDERS.

Original application filed Kay 81, 1828, Serial No. 848,618. Divided and this application filed August 18,

1985. Serial 10. 50,087.

This invention relates to surface grinding machines and in particular a sizing device therefor enabling an operator to determine the progress of and completion of the grind.

ing operation, and is a division ofmy oopending application Serial No. 642,613, filed May 31, 1923.

An object of the present invention is to provide a small member adjacent the work support adapted to be abraded by the work contacting surface of the wheel.

Another object of the invention is to mount an indicator on the member adjacent the work table, the indicator having its movable pointer actuated b ga ing the abraded sur ace of the member. further object of the invention is to provide means permitting said member to be fed a small amount after the completion of each grinding operation so that 1t will contact with and be abraded by the wheel during each successive grinding operation.

With these and other objects in view, my invention consists in the features of construc- 26 tion and operation set forth inthe following specification andv illustrated in the accompanying'drawings. v

v In the accompanying drawings annexed hereto and forming a part of this specification, I have shown my invention embodied in a vertical surface. grinder in which a ver- ;tically movable wheel abrades work mounted on a rotatin table, the plane of which is fixed, but it wi 1' be understood that the invention can be otherwise embodied and that the drawings are not to be construed as definin or limiting the $00 in relied upon forthat purpose. 40 [n the drawin Fi re 1 is a out elevation of grin er having the present mventlon an the -work tableWand preferabl an extension enof the invention, the c aims appended tot e specification be.-

of partin its broadest my in-" vention comprises: first, a surface grindin machine havmg a work supporting table an a. rotatable abrasive wheel, one of these members being mounted so that it can move toward theother during, the grinding operation; second, a, member mounted adjacent rotatable at a slow speed; third, means to eed this member after each grinding operation so that it will becontacted by the wheel durin each operation; and fourth,'an indicator 9. apted to contact with the wheel engaging surface of the member. 1

Referring more in detail to the figures of the drawing, a vertical surface|gr1ndcr is disclosed having ,a base 10 and column 11. Within the base 10 is a table 12 which may be rotated by anypreferred or usual means. On the columnll is a slidable head 13 carry ingia rotatable grinding wheel 14 at its lower As these parts may corres 0nd exactly to those disclosed in my copen ing application Serial No. 642,613, filed May 31, 1923, it is not thought that further description is necessary. The invention, it will be understood, is applicable to surface grinding machines in which either the wheel li is movable toward the work table 12 during operation or the work table 12 is moved toward the wheel '14. The former only of. these forms of the invention is illustrated.

Adjacent the work table 12 is a relativelg; small member 15 on the upper end of a sha 16. This member and its shaft 16 rotate about an axis parallel to the axis of rotation of the work table. The shaft 16, the rotat member 15 and attached parts are carried h a bracket 17 adjustably clamped to a gui ewa formed in a portion of t e column 11. e shaft 16 ma be rotated by means of a driving she 18 connected through bevel gears19 and 20 to a sleeve 21 surrounding the shaft 16 carrying the rotatable member 15. The sleeve 21 is, as shown,

splined to the shaft 16 so that the shaft 16 Y may be moved axiallywhile it is being rotated. Preferably the member 15 on the up- 7 per end of the shaft 16 is removably attached so that other similar members may be easily substituted when one is worn out. It 1s made of any suitable material such as cast iron which may be readily abraded bg the wheel 14 while acting upon the work lank W. on the table 12. Also theupper end of ported on the upper end of a. sleeve 24.

. 1ts position vertically. B

In order to a just into sition and feed the rotatable member 15 orwardly or upwardly after the completion of each grindin operation, the sleeve 24 is suitably supported in the bracket 17 and has an elongated threaded portion 25 on its lower 'end. Surrounding this sleeve 24- and engagin its threaded portion 15 is a gear 26. Mes g with the teeth of this gear 26 is a pinion 27 on the upper end of a splined shaft 28 supported within the bracket 17. In a supplementary bracket 29 a ratchet wheel 30 is provided splined t0 the shaft 28 andadapted to be engaged by a pawl 31 on a rod 32 movable within the bracket 29. The end of this rod 32 extends beyond the bracket 29. and may be engaged either by the hand of the operator or by a lever controlling the movements of parts of the grinding machine. With each longitudinal movement of the rod 32 or.

plunger the ratchet wheel 30 and the splined rod 28 are rotated slightly so that the sleeve 24 is slightly elevated by rotation of the gear 26 upon the threaded portions 25 of the sleeve 24. To prevent rotation of the sleeve 24 during rotation of the gear 26, a detent 32 is provided which is adapted to engage a short spline or recess formed in the sleeve 24. To remove the sleeve 24, if necessary, it is only required to remove the detent 32 from the recess or spline. For this purpose the detent 32 is mounted on a manually movable and spring pressed plunger 33.

From the above description it will be seen that a small rotatable and abradable member 15 is provided adjacent the work table 12 having a surface adapted to be engaged and abraded by the wheel 14. Also means are provided to rotate the member 15 and means of the bracket 17 supporting the eeve 24 carrying .the member 15 and attached parts, the position of the surface on themember abraded by the wheel 14 may beadju'sted vertically. This adjustment is made each time the are set up for operation with work W 0 any one finished thicknes'. When one adjustment is made, however, it is not H to be chan until other work b a; of materially erent thiekn are operated Adapted to contact with the upper surface of the rotatable member 15 is an 40 outstandingfromaverticalrodfl. This rod41issupportedwithinbedrin42inan the movable mahber 44 of I --fixedinpositiontoflieupper-mdcfthe upward extensionmfitothebrachetl'lsupportingthesleevefiandilsattadied Therodflisafladiedatilsuppermdto anmdicator bracketl mam .fed upwardly.

er 46, moved by the vertical movement of the rod 41, is rovided movable about a. graduated dial. e position of the surface of the rotating member 15 therefore can beat all times determined after a first work blank has been abraded and tested.

The operation of the indicating device Wlll now be described. The bracket 17 is first adjusted to a position so that the rotating member 15 is slightly higher than the upper surface of a finished blank W. vThe surface of the member 15 contacted with by the wheel 14 will be abraded by the wheel as the wheel is fed downward during its operation upon the work W. When the workW has been reduced to its finished dimension the upper surface of the work W-and the u per surface of the rotating member 15 will at the same height, that is, in the same plane. The indicator 45 is then set by adjusting the length of the rod 40 so that, with the extension 40 resting upon the surface of the rotating member 15 when work has been completely ground, the inter 46 will stand over the zero of the sea e of aduations' on the dial. When the finishe work W has been removed and other blanks mounted on the table 12 the rotating member 15 is elevated by movement of the plunger 32 and r0- tation of the gear 26 on the threaded ortion of the sleeve 22. When the whee again lowered to engage the work W it will en age and ahrade the rotating member 15 before W is'reached. The rotating member 15 will thereafter be abraded simultaneously with the work blank W, and, with abrasion of the the final dimension of the work blank IOtllilllg member 15 the indicator pointer 46 will be moved until, when the finished dimension'of the work blank W is reached, the

pointer 46 of the indicator will a in stand over the zero of the graduated dial. During this period when the wheel 14 simultaneously abrades the work pieces W on the supporting table 12 and the rotating member 15, the pointer 46 of the indicator will indicate the progress of the grinding. With each successive operation upon blank W on thetable 12 the rotating member 15 is worn away an amount us] to the distance it is er a number of operations the member 15'may-be removed and a new one substituted and adjusted to position as stated above.

What I claim is: g

1. A sizing device" for surface grinders comprising in combination, a work supportingtable, a wheel support, means to rotate .said'wheel, mean 'to cause relative moveparls. ment between said'table and wheel su PP a adjacmt the work table adapted to contact with and'be'abraded by thework contacting surface of the wheel, and min dicator having a movable bar in contact with preferably 0ffll6dil1millMlwtlmabradedsurfaceofsaidmmberwhereby a, reading of said indicator will determine 7 the progress of the grinding operation.

said wheel, means to cause relative movement .between said table and wheel su port, a

grinding operations.

member adjacent said table a member ad'acent the work table apted to contact wit and beabraded b the work contacting surface. of the whee, .an indicator having a movable bar in contact with the abraded surface of said member whereby the reading of said indicator will determine the progress of the rindin operation, and means to advance t e mem r for successive 3. A sizing device for surface grinders comprising in combination, a worksupporting table, a wheel support, means to rotate and wheel, means to move said wheel sup port toward said table during operation, a apted to contact with and be abraded by the work con tacting surface of the wheel, means to rotate saidmember about an axis parallel to the axis of rotation of the work table during 0 eration, and an indicator hav a movab e bar in contact with the abrad surface of said member whereby the reading of said indicator will determine. the progress of the grindingo tion. f tit-siz ng device for comprisingin combination, awork supportsaid wheel, means to cause indicator havi .with said mem r whereby the reading of ing table, a wheel support, means to rotate bet 1 em a i'fii" "35 weensa1 eanw su' -a i table .rotatable member adjacent said wor adapted to contact with and be abraded b the workv contacting surface of the whee and a dial indicator having a pointer attached to a movable bar in contact withthe abraded surface of said member whereby movement of said indicator inter determines the progress of the grinding operation.

5. A sizing device for surface. grinders comprising in combination, a work supporting and rotating table, a wheel support,

means to rotate said wheel, means to cause.

re}llatilve movemulnt betvzheen said table and w ee support ur1 e' operation, a rotatable mem r m work table adapted to contact with and be abraded by the work contacting surface of the wheel,

means to rotate said member about an ans parallel to the axis of rotation of said table, means toadvance said rotatable member axially after each grinding operation, and an a movable bar in contact said indicator may determine the progress of .the grinding operation.

In testimony whereof, I hereto afix my Jonas noun