US2269669A - Casting machine - Google Patents

Description

Jan. 13, 1942. H. KELLY 2,259,669

I CASTING MACHINE File dDeo. 26', 1959 2 Sheets-Sheet 1 INVENTKOR. MICHAEL H. KELLY I ATTORNEYS Jan. 13, 1942. M. H 'KELLY- 2,269,669

CASTING MACHINE Filed Dec. 26, 1939 2 Sheets-Sheet 2 a INVENTOR- MICHAEL H. KELLY BY I 54 4 I ATTORNEYS Patented Jan. 13, 1942 CASTING MACHINE Michael H. Kelly, Detroit, Mich, assignor to Kelsoy-Hayes Wheel Company, Detroit, Mich., a corporation of Delaware Application December 26, 1939, Serial No. 310,988

8 Claims. (or. 22-65) The invention relates to casting machines. and refers more particularly to machines for casting liners in brake drum shells.

The invention has for an object to provide an improved casting machine having means for heating the shell and means for externally supporting the shell, the heating means being movable into inoperative position and the external supporting means being movable into operative position at the same time. 7

The invention has for another object to pro-- vide improved mechanism ior simultaneously moving the heating means and the external supporting means.

The invention has for further. objects to provide a simple construction of fluid operated devide a second fluid operated device for retarding the movement of the heating means during the final portion of its movement to inoperative position; v v These and other objects of the invention will 7 become apparent from the following description,

a casting unit for centrifugally casting a cast 'vice for moving the heating means and to proouter ends the ring which "carries the sealing element [5. The sealing element comprises the annular adaptor plate It fixedly secured to the A inner side of the ring 14 and the annular sealing member I! located in a recess in theinner side of the adaptor plate. The sealing ring is formed with the inwardly extending hollow rib It; the inner or nose portion of which preferably has short parallel sides and the remainder of which has flared sides.

I9 is a second hollow shaft axially. slidable within and guided by the hollow shaft 8. The second shaft is adapted to be reciprocated by the piston 20 which is reciprocable in the cylinder 2| concentric with the shafts and fixedly secured to the inner side of the pulley 9. A suitable medium under pressure, preferably-compressed air, may be admitted to and exhausted from either side of the piston through'the pipes 22 and 23 under the control of the valve 26 whichis adapted to be manually operated. The valve is of stand- 1 ard construction manufactured by a well known iron liner within the annular flange "of a brake drum wrought metal shell. Theshell is preferably formed from a fiat steel .blank by a suitable drawing operation and has the annular flangev I iorm'ed'of the generally cylindrical portion 2 and z the enlarged generally cylindrical portion 3 terminating in the flaredportion I. The shellhas the integral generally radially extending back or web 5 connecting into the opposite-edge of the annular-flange. The casting unit has the bed 6 provided with the upright bearings I spaced from each other. 8 is a hollow shaft journaled in the bearings and having secured to its innerendthe pulley S andto its outer end the head II. The pulley is eng ged by the belts I I which are driven by the electric motor I! suitably supp rted atone side of the bed 6. I! are rods extending transverselv outwardly from the head It, the inner ends of the rods being fixedly secured to the head; The rods have fixedly secured to their manufacturing concern and receivesthe medium under pressure from the supply line 24 and pipe 24' andexhausts into the atmosphere through the pipe 25.

.The connection between the second shaft-l9 and the piston 20 comprises the piston rod 21, the stud 28 threaded into the outer end of the rod and having the integral collar 25 abutting the inner end of the second shaft I! and the pin 30 which extends through the outer end of the stud and the inner-end portion of the second shaft. The arrangement is such that the second shaft is positively reciprocated in both directions and in its outer direction the pin is relieved from shear by the collar upon the stud. A central abutment 3i and a support 32 are fixed upon the outer end of-the second shaft l!.- The support comprises the body 33 which is sleeved upon and I guided bythe rods l3 and the ring 3| which is positioned concentrically inthe body. The ring is preferably formed with the internal angularly spaced axially extending ribs 35, the internal surfaces together forming aninterrupted contour engageable with the external surfaces of the an nular. portions 2 and 3 and the flared portion 4 of thebrake drum annular flange to true, size and externally support the annular flange and also clamp thefiared portion against the sealing rin while-the molten cast iron is being'poured into the shell; a

38' is a third shaft which is axially slidably mounted in and gulded by the second shaft s.

:15 The third shaft has fixedly secured to its outer Y end the pilot abutment 39 and is also provided with the collars 46 and ll for slidably engaging the second shaft. '52 is a coil spring within the second shaft and located between the stud 28 and the third shaft for yieldably urging the third shaft axially outwardly to engage the collar Ill with the central abutment II. The pilot abutment is adapted to-recelve the web of the brake drum shell, the pilot portion being adapted to extend through the central opening in the web and the abutment portion being adapted to abut the adjacent portion of the web. The brake drum shell is inserted in the machine by passing the shell downwardly between the sealing element and the support 32 until thev central opening in its web has registered with the third shaft 36 after which the third shaft is urged inwardly against the resistance of the.

spring 62 and the shell is located on the pilot abutment. Then the spring is permitted to urge the third shaft axially outwardly to thereby move the shell axially outwardly until the collar 40 abuts the abutment 3i. At this time the flared portion 4 of the annular flange of the shell loosely engages the sealing ring l1, the uppermost part of the flared portion resting lightly upon the uppermost part of the rib l8 and the remaining part of the flared portion being spaced sufliciently from the rib to permit the passage by the upright post 56 which is journaled in and supported upon the bracket 5| near one end thereof. The bracket is located at one side of the ring M. The lower end of the post is provided with the pinion 52 preferably by forming gear teeth integral with the post. The teeth of the pinion mesh with the teeth of the rack 53 preferably 'formed integral with the piston rod 54 axially reciprocable in the bracket 5|. The piston rod is operatively connected at its inner end to the piston 55 which is axially slidable in the cylinder 56 formedin the inner end of the bracket. 51 is a pipe leading from the inner end of the cylinder 56 to the pipe 22.

The arrangement is such that upon manual operation of the valve 26 to allow compressed air to enter the cylinder 2! and force the piston 26 axially forwardly thereby externally engaging the ring 34 with the annular flange of the brake drum shell, air is at the same time permitted to enter the inner end of the cylinder 56 .to move device is used to retard the burner during the final portion of its retractile movement. In detail. 56 isa cylinder mounted on the end of the bracket 5| in axial alignment with the cylinder 56. 59 .is a piston within the cylinder 66 and having the reduced end portion 66 adapted to be engaged by the outer end of the piston rod 54-. The outer end of the cylinder." is connected to the pipe 6| which is in communication at all times with a source of compressed air at the same pressure as the compressed air in the pipe 51. The two cylinders 56 and 58 are preferably of the same diameter. The arrangement is such that when compressed air is admitted to the cylinder 56 and its piston and piston rod are advanced, the-rod duringthe flnal portion of its advancement engages the' reduced end portion 66 of the piston 59,-which latter then yieldably retards further advancement, the parts finally coming to rest in a position determined by the balance in air pressures in the two cylinders.

6| is a ladle adapted to contain molten iron. The ladle is mounted upon the arm 62 which is fixed upon the horizontal shaft 63 journaled in the free end of the arm 66. The latter arm is pivotally mounted upon the bracket 65 to swing through a horizontal path. 66 is a handle upon the shaft 63 for swinging the ladle from inoperative position outside the brake drum shell to operative position inside the shell and then tilting the ladle to pour the molten iron against the annular flange of the shell.

What I claim as my invention is:

1. In a casting machine, the combination with means for rotatably supporting an annular member, of a gas burner insertable within the annular memberfor heating the same, other means engageable with the external surface of the annular member for rotatably supporting the same, means for simultaneously moving said gas burner from within the annular member and for moving said other means into engagement with the annular member, and means for pouring fluidmaterial into the annular membe when heated and supported.

2. In a casting machine, the combination with means for rotatably supporting an annular member, of means insertable within the annular member for heating the same, means externally engageable with the annular member to rotatably support the same, fluid operated devices operatively connected to said heating means and externally engage-able means for respectively moving said heating means away from the annular member to inoperative position and said externally engageable means to operative posithe piston 55forwardly to thereby swing the gas burner from its operative position within the brake drum shell to inoperative position. In other words, the arrangement provides for s11- multaneously moving the gas burner to' inoperative position and the.external support for the annular flange of the brake drum shell to operative position.

To prevent objectionable jarring of the machine during the movement of the gas burner to its retracted or inoperative position by the fluid operated device, comprising the air cylinder 56 and the piston 55, another fluid operated tion in external engagement with the annular member, common means for controlling said fluid operated devices, and means for pouring fluid material into the annular member after having been heated and while externally supported.

3. In a machine for casting a Main the annular flange of a wrought metal brake drum shell, the combination with a sealing element en-. gageable with the free edge portion of the annular flange, of means for urging the shell toward said sealing element, said sealing element and urging means serving to rotatably support the shell, a gas burner insertable within the shell for heating the annular flange, an external support movable into engagement with the annular flange and adapted to clamp the free edge portion against said sealing element, said extervice operativelyconnected to said her for moving the same in one direction, and a nal support and sealing element sewing to rotatably support the shell, fluid operated means operatively connected to said gas burner and external support for simultaneously moving said gas burner from within the shell to inoperative position and said external support into engagement with the annular flange, and means for subsequently pouring liner material into and against the annular flange. i

4. In a machine for casting a liner in an annular portion of a shell, the combination with means for rotatably supporting the shell, of means insertable within the shell for heating the.

annular portion, means engageable with the externalsurface of the annular flange for rotatably supporting the same, means for simultaneously withdrawing said heating means from within the shell and moving said supporting means into engagement with the annular flange, and means insertable within the shell for pouring fluid liner material into the annular flange after having been heated and while externally supported.

5. In a casting machine, the combination with means for rotatably supporting an annular member, of a gas burner insertable ithin the annular member for heating the same, a movable member carrying said burner, a fluid operated desecond fluid operated device opposing said first mentioned device and serving to retard said movable member during the 'flnal portion of its movement.

6. In a casting machine, the combination with meansior rotatably supporting anannular member, of a gas burner insertable-within the annular member for heating the same, a pivotal arm carrying said burner, a member revoluble about its axis for supportingsaid arm, a pair of axially spaced cylinders having ports in, their outer ends for the passage pressure, pistons within said cylinders movable ,toward each other under pressure of the medium, and a rod connected to one of said pistons and operatively connected to said revoluble member and adapted to engage the other of said pistons.

movable mem- 'ment'with the member at 'I. In' a casting machine, the combination with means for rotatably supporting a'member, of movable heating means for the member, other means movableinto engagement with the member for holding the same to size, said other means providing for rotatably supporting themember, means for moving 'said heating means away from the member to inoperative position other means to operative pcsition in engagemeans for pouring fluid the member while heated and while said other means is in operative position.

8. In a casting machine, the combination with means for rotatably supporting 'a member, of movable heating means for the member. a fluid operated device operatively connected to said heating meansior moving the same in one direc tion, and a second fluid operated device opposing said first mentioneddevice and servingto retard said heating means during its movement.

of a' medium under and said the same, time, and f casting material against

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