US2650458A

US2650458A - Disk edge deburring machine

Info

Publication number: US2650458A
Application number: US284099A
Authority: US
Inventors: Wallace Frank Charles
Original assignee: Collins Radio Co
Current assignee: Collins Radio Co
Priority date: 1952-04-24
Filing date: 1952-04-24
Publication date: 1953-09-01
Anticipated expiration: 1970-09-01

Description

Septl, 1953 F, c.'wA| LAcE l 2,550,458

DISK EDGE DEBURRING MACHINE Filed April 24, 1952 INVENToR. 'f/PAAM* C? M14 4c! Patented Sept. 1, 1953 DISK EDGE DEBURRING MACHINE Frank Charles Wallace, North Hollywood, Calif., assignor to Collins Radio Company, Cedar Rapids, Iowa, a corporation Aof Iowa Application April 24, 1952, Serial No. 284,099

This invention relates in general to disc edge grinding means and in particular to apparatus for removing burrs from the outer edge of discs.

Mechanical filters made according to the principles disclosed in the co`pending patent application of Melvin L. Doelz entitled Mechanical Filters, filed September 24, 1951., Serial Number 248,011, require a series of metal discs which `serve as the frequency determining elements of the filters. The physical dimensions of such discs are quite critical. In construction of mechanical lilters, according to the previously referenced Doelz application, applicant has found it desirable to produce discs by cutting them from rod stock of suitable material, as for example Nispan C which is a nickel alloy. Such cutting often-times leaves the discs with burrs about their outer peripheries which affect the frequency characteristics of the disc.

It is an object of this invention, therefore, to provide a disc edge deburring machine which will remove the rough edges from a plurality of discs.

Another object of this invention is to provide a disc edge deburring machine that will quickly iinish the edges of a plurality of discs.

A feature of this invention is found in the provision for a pair of abrading wheels mounted adjacent each other and driven at different speeds with a plurality of discs held between the wheels by guide means.

Further objects, features and advantages of this invention will become apparent from the following description and claims when read in View of the drawings, in which;

Figure 1 is a top view of the disc edge deburring machine with the guide roller pivoted upwardly;

Figure 2 is a top view of the disc edge deburring machine with the guide member pivoted downwardly to the operating position; and

Figure 3 is a sectional view taken on line 3-3 of Figure 2.

Figure 1 shows a base plate IIJ which has mounted thereon upwardly extending end plates II and I2. A rst roller I3 of relatively large size is mounted between the end plates II and I2 on an axle I4. A driving gear I6 is attached to the axle I4 and meshes with a gear I1 connected to the output shaft of a suitable driving means, as for example an electric motor I8.

A second roller I9 is rotatably supported between the end plates II and I2 and is attached to an axle 2| which extends through the plate I2 and is connected to a gear 22 which is larger in size than the gear I6.

2 Claims. (Cl. 51`-103) The gear 22 meshes with gear I1 and is driven by themotor IB. The roller I9 is smaller than the roller I3. The rollers I3 and I9 are covered with an abrasive material, as for example, emery cloth which is designated as 23 and 24, respectively, in Figure 3. The emery cloth may be glued to the rollers or attached in any other well known fashion.

Rotatably supported between the end plates II and I2, 'adjacent the rollers I3 and I9, is a guide means 26. The guide means 29 is supported on an axle 21 which has a lever arm 28 extending therefrom. A Weight 29 is mounted to the outer end of arm 28.

As best shown in Figure 2, a pair of generally rectangular brackets 3| and 32 are rotatably supported adjacent each end on the axle 21 and a shaft 33 is rotatably supported between the outer end of the brackets 3I and 32 in suitable bearings. 'I'he brackets 3l and 32 are pivotally connected to the axle 21 so that the holding assembly may be moved relative to the rollers I3 and I9.

Slidably and rotatably mounted on the shaft 21 are a pair of

brackets

34 and 36, respectively, which have knurled

collars

31 and 38, respectively, attached thereto and fitted about the axle 21. The outer ends of the

brackets

34 and 36 encompass the shaft 33. As best shown in Figure 3, the

brackets

34 and 36 have downwardly extending projections 35 that extend below the axle 33 in the operating position.

A plurality of discs 39 are supported between the rollers I3 and I9.

In operation, the axle 33 is pivoted upwardly to the position shown in Figure l and a. number of discs 39 which are t0 be deburred are placed in the valley between the rollers I3 and I9. The holding means is then pivoted to the position shown in Figure 2 and the

knurled brackets

31 and 38 are pressed toward each other so as to hold the discs together.

The weight 29 applies a holding force to the axle 33 through the brackets 3| and 32. The motor is started and causes the rollers I3 and I9 to turn. The gearing as shown causes the rollers I3 and I9 to move in the same direction of rotation with the roller I3 traveling at approximately twice the angular velocity of the roller I9. It is this dierence in angular velocity, as Well as the difference in diameters of the rollers I3 and I9, which removes the burrs.

After a predetermined time the motor may be stopped and the lever arm 28 pivoted to the position shown In Figure 1 and the discs removed.

It is seen that this invention provides means for quickly and accurately deburring a plurality of discs While maintaining their symmetrical characteristics.

Although the invention has been described with respect to a preferred embodiment thereof, it is not to be so limited as changes and modifications may lbe made therein which fare within the full intended scope of the invention, as dened by the appended claims.

I claim:

1. A disc edge grin-ding means nomprising, v:a base plate, a pair of end plates attached to the base plate, a first roller rotatably supported -between said end plates, a second rller'retatably supported between said end plates adjacent the iirst roller, a driving means Ygeared y'to-said ifirst and second rollers to drive the first roller at approximately twice the angular rate of the .second roller, said `first-roller having a diameter usubstantia'lly twice that of the second rller, an v:axle pivotally supportedbetweenfsaid end plates, apair of bracketssupportedby saidaxle, a shaft supported between the ireeren'ds Aof lsaid brackets, and dasecond pair-of brackets slidably supported `on ssa-id axle @and said ysha'ftvand engageable with said plurality of discs to preventthem-from movl.ing :longitudinallyof said rollers.

2. .A disc edge grinding :means (comprising, Aa Dbase plate, fa fpair Lof -end yplates attached V-to the base plate, a rst roller rotatably supported between said end plates, a second roller rotatably supported :between said end plates adjacent the first roller, a driving means geared to said iirst and second rollers to drive the rst roller at approximately twice the angular rate of the second roller, said rst roller having a diameter 'substantially `twice thatof the second roller, :an axle pivotally supported "between said end plates, a pair of brackets supported by said axle, a shaft supported between the free ends of said brackets, 'a second pairof brackets slidably supported on said axle and said shaft and engageable with sai-d plurality 4of `discs to prevent them from moving `flongitudnallyvdf said rollers, a lever arm attached to said axle, and a weight attached to the end of saidleverarm 'to-bias it in one direction.

FRANK CHARLES WALLACE.

References Cited in fthe le of this patent UNITED STATES PATENTS Number Name Date 1335,333 Olson Nov. 12. :1929 2;465,-178 Sommer Mar. 22, 1949 2,497,076 Ferguson Feb. :14, 11950 FOREIGN PATENTS Number Country Date 152,632 .GreatBritain. May A18, 1'92'0