US1564011A - Alignment jig for use in casting rolls - Google Patents

Description

Dec. 1, 1925. 1,564,011

T. H. OPPENHEIM ET AL ALIGNMENT JIG FOR USE IN CASTING ROLLS Filed Nov. 20, 1924 2 sh s sheet ff/ifo apenez'zrz 2515221202155" Dec. 1, 1925.

T. H. OPPENHEIM ET AL ALIGNMENT JIG FOR USE IN CASTING ROLLS Filed Nov. 20, 1924 2 Sheets-Sheet 2 z fiopperzkezm 3. Sal/c0215? Patented Dec. 1, 1925.

i5 MT B S arr reason tries.

THEODORE H.

OIPEENHIEIFT AND BERHhRD OF CQLDTI'ATER, OHIO, AS-

SIGNORS TO NEW IDEA SPREADER 00., OF GQLDi ATEB, 0311 A GUBEORATION OF OHIO.

ALIGNMENT JIG F03 USE IN CASTING ROLLS.

Application filed November 20, 1924..

To all whom it may concern.

Be it known that we, Trrnononn H. OrrnN- I-IEIM and BERNARD SnLHoRs'r, citizens of the United States, residing at Goldwater, in the county of Mercer and State of Ohio, have invented certain new and useful Improvements in Alignment Jigs for Use in Casting Rolls of which the following is a specification.

This invention relates to means for easting rolls and is intended more particularly for use in casting the snapping rolls of cornhusking machines but it may be advantageously employed in the casting of all rolls where it is desirable to have the spindles or shafts of the rolls in axial alignment.

It is common foundry practice at this time to place a long piece of cold rolled shafting or short pieces to form trunnions in a mold and then pour the metal for forming the roll around the shafting or trunnion pieces, the shaft or trunnions being thereby integrally united with the body of the roll. In general, the shaft or trunnion member under present methods is warped or slightly distorted in the casting process and it is. necessary to subsequently place the roll and the shaft or trunnion in a lathe and turn it down to the desired diameter. The shaft or trunnion is, therefore, originally of a greater diameter than is desired in the finished article in order to permit subsequent machining. Obviously, this process causes a waste of material and destroys the wearing qualities of the shaft owing to the fact that the skin of the cold rolled shafting is broken or entirely destroyed when it is turned down, in the lathe. It is the object of our present invention to provide means for use in casting rolls and to so employ such means that the shafting or the trunnion piece may be placed in the mold and be originally of the proper diameter desired in the finished article, avoiding the waste and the cost of subsequently turning the spindles in a lathe. It is also an object of the invention to provide means whereby the spindles or shafts will be in exact axial alignment in the finished roll and the finishing of the roll in a lathe will be expedited while the original skin of the cold rolls will be retained and consequently the durability of the finished article will be enhanced. These objects, and other objects which will Serial No. 751,081.

incidentally appear in the course of the following description, are attained in such means as is illustrated in the accompanying drawings, and the invention resides in certain novel features which will be particularly pointed out in the claims.

In the accompanying drawings:

Figure 1 is a perspective view of our im* proved alignment jig;

Fig. 2 is a similar view showing the in position upon the following board and in the drag flask;

Fig. 3 is a similar view showing the in position with a portion of the cope flask showing above the pattern, and

Fig. i is an end view of the jig.

The drawings show the invention employed in connection with a sand mold but it is to be understood that it may be employed in connection with chill molds or core molds or molds of any other type.

In carrying out our invention, we employ a rigid frame which is preferably rectangular in form and consists of end bars 1 and 2 connected at their ends by side members 3 which are preferably of angle bar formation whereby longitudinal flanges or ribs 4 are formed upon one side of the side bars at the outer ends of the same. These flanges serve to reinforce the side bars and also aid in holding the jig in place in the drag flask, as will be hereinafter set forth. At'the center of each end bar 1 or 2 is formed a groove 5 which may be V-shaped, as shown in Fig. 1, or semi-cylindrical, as shown at 6 in Fig. 4. These grooves extend parallel with the side bars 3 of the jig and consequently are in axial alignment. Each end bar is reinforced on one side with a transverse rib 7 extending between the flanges 4 of the side bars, as shown clearly in Fig 2, it being understood that the grooves are formed in. flat faces of the end. bars which are located in planes parallel with the inwardly projecting webs of the side bars. The flat faces of the end bars are uppermost in Fig. 1 and are adapted to rest uponthe follow board 8 in the use of the device, as shown in Fig. 2. We also employ clamping bars or plates 9 which are adapted to rest upon the flat faces of the end bars 1 and 2 and are provided at their cens mating grooves 5 or 6 in the end bars of the jig, as shown in Figs. 1 and 4t. Openings 11 are formed in the end bars to receive cap screws or bolts 12 which are inserted through openings provided therefor in the end portions of the clamping bars whereby the bars may be securely fastened upon the frame. Preferably, the clamping bars are reinforced at their centers by ribs 13 extending over the grooved portions thereof.

In using the device, the ig frame is placed upon the follow board 8 with the flat faces of the end bars 1. and 2 resting upon the up per face of the follow board and the grooves 5 or 6, as the case may be, extending over the end portions of the pattern member 14 on the board. The drag flask 15 is then placed in position upon the follow board and packed with sand, as indicated at 16, after which the bottom board 17 is secured in place by the clamps 18, the formation of the flask and the sand mold being accomplished in the usual manner. The flask is then inverted and the follow board removed, after which the cope flask 18 is placed in position and packed with sand, as indicated at 19, in the usual manner so as to complete the mold. Before placing the cope flask in position and forming the upper half of the mold, we place core pieces 20 in the grooves 5 or 6 of the jig and then secure the clamping bars or cap plates 9 in position over these core members, and it is to be noted that these core members are provided with annular flanges or disk portions 21 which will leave a shouldered recess in the sand of the mold. After the cope has been fully packed with sand, it is lifted off the mold and the pattern removed, the clamping bars or cap plates 9 being also removed so as to permit the core pieces 20 to be withdrawn. The shaft members are then placed in the grooves of the and the cap plates again secured in place, core rings similar to the disks 21 being .tted about the shafts against the ends of the extended portions 22 of the end bars and cap plates of the after which the cope flask is secured in place and the pouring performed in the usual manner.

In securing the cap plates or clamping bars 9 in position over the ends of the shafting or trunnion members. the walls of the grooves within the end members of the jig and the said cap plates or clamping bars will be caused to engage the said shaft or trunnion members so that they will be held firmly in axial alignment. but the parts are so proportioned that, while the shaft or trunnion members cannot move laterally and are, therefore, prevented from bending or warping, they can slip longitudinally sulficiently to accommodate the expansion and contraction which takes place as a result of the variations of temperature in the mold and the pouring during the casting operation. The side and end members of the jig will be firmly embedded in the sand and they will be farenough from theheated mass so that they will not expand or warp while in use. By using this jig, we are able to employ a shaft member which is of the exact diameter desired in the finished article and there will be no waste due to subsequent turning in a lathe. hloreover, if it should be necessary to grind the rolls or otherwise finish them after the casting operation has been completed, the spindles or trunnions. are simply placed on centers in a lathe and a cutting tool can then be run the entire length of the roll or if it is not desired to turn the roll in a lathe, the roll with its spindle may be placed on centers and the contour of the rolls may be ground. The use of our jig retains the original skin on the cold rolls and the shafting studs or trunnions at the ends of the roll are in perfeet axial alignment. The end core members which are placed around the trunnion or shaft members and against the ends of the tend to protect the adjacent portions of the jig from the heat so that-it will not warp and it, furthermore, counteracts the chilling effect of the steel stud or shaft and prevents the formation ofchilled cast iron where the metal might run out. Our improved jig is very simple in construction, may be produced at a low cost and may be employed in any mold and effect a reduction in the cost of production as well as produc ing a superior article.

Having thus described the invention, we claim:

1. The combination with a mold for easting rolls having shaft members at their ends, of means for securing shaft members at the ends of the mold cavity and maintaining said members in axial alignment while permitting endwise movement of the same during contraction of the cast roll.

2. A for use in casting rolls with shaft members in their ends comprising an open frame adapted to fit within but free of the mold around the mold cavity and in spaced relation to the cavity and provided at its ends with means for securing shaft members in axial alignment projecting into the ends of the mold cavity while permitting endwisc movement of the shaft members, and core members adapted to, rest against the end portions of the frame around the shaft members held therein.

3. A jig foruse in casting rolls having shaft members in their ends comprising an open frame adapted to fit within but free of a mold and provided at the centers of its ends with grooves extending longitudis nally and in axial alignment, and similarly grooved clamping members adapted to be secured upon the end portions of. said frame whereby to secure shaft members in axial alignment and restrain sidewise movement of said members but permit endwise movement thereof.

t. A jig for use in casting rolls having shaft members in their ends comprising a rectangular frame adapted to fit Within but free of the mold, the end members of which frame have fiat upper faces and longitudinally extending grooves in the flat faces of said end members at the centers of the same, and clamping bars adapted to be secured upon the flat faces of the end members and provided with grooves to mate with the grooves in said members, the end members and the clamping bars having central portions projecting inwardly to the respective ends of the mold cavity to support shaft members against sidewise movement While permitting endwise movement thereof.

5. A jig for use in casting rolls having shafts in their ends consisting of a rectangular frame having longitudinally extending ribs along the outer edges of its side members and provided with transverse ribs on its end members extending between the said ribs on its side members, the end members having flat faces at the sides remote from the ribs on said members and being provided in said flat faces at their centers with longitudinally extending grooves, and clamping plates adapted to be secured upon the flat faces of the end members and provided with flat faces to form contact With the flat faces of the end members and having grooves mating with the grooves in the end members whereby to secure shaftmembers against sidewise movement While pern'iitting endivise movement thereof, said clamping plates being provided on their outer faces With ribs extending transversely of the mold.

In testimony whereof We aflix our signatures.

THEODORE H. OPPENHEIM. [1,. s.]

BERNARD SELHORST. [1,. s.l

Images