US1704327A

US1704327A - Device for heat treatment of metals

Info

Publication number: US1704327A
Application number: US183819A
Authority: US
Inventors: Edward F Kenney; Louis H Winkler
Original assignee: Bethlehem Steel Corp
Current assignee: Bethlehem Steel Corp
Priority date: 1927-04-14
Filing date: 1927-04-14
Publication date: 1929-03-05
Anticipated expiration: 1946-03-05

Description

DEVICE FOR HEAT TREATMENT OF METALS Filed April 14. 1927 2 Sheets-Shee l 4' INVENQTR I 1 71i?! 1 ain 19: mm

ATTORNEY March 5, 1929, E. F. KENNEY ET AL 1,704,327

DEVICE FOR HEAT TREATMENT OF METALS Filed April 14, 1927 2 Sheets-Sheet 2 ATTORNEY nnwm 1,01- s rmmvma, assrexons rmmvnm h r a ANDLOUIBH. o nn'rnmmmr srnm. comm,

1,104,321 PATENT ori ice.

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mwicn ron ma rnnnmm or mans Application filed April 14, 1927. Serial Io. 188,818.

' Our invention relates to a machine for quenching metals, as a step in rocesses for h the heat treatment thereof. ore particularly, it relates to an apparatus wherein metallic bodies having an irregular distribution of metal, are to be treated by rotatingthem in contact withcooling media.

A purpose of our invention is to provide structure whereby metallic solids of revolution, of varying sizes maybe turned in contact with a cooling medium. r

A further object is toprovide supporting and guiding means'for such solids, adjustable todififerent sizes thereof.

A still further, and important, object ofthis invention is to provide means for protecting portions of these solids from contact wlth the cooling medium, while the remaining por- A tionsthereof are being subjected thereto.

Our invention consists essentially of means for adjustably su porting solids of revolution and rotating t em in contact with a C0019. ing medium. It further consists in means whereby portions of such a solid can be shield- 5 ed from contact with the cooling medium,

such shielding means being easily moved into or out of operative engagement with the object being treated. V

In the specific description following, a wheel is iven as an example of an object to be treate but it is obvious that the device is applicable to other solids of revolution as well. 7.

It is well known that in quenching wheels, and similar objects of irregular conformation, undesirable stressesare frequently brought into play .because of the unequal rate at which they cool. In the car wheel which is here given as an example, obviously there is such a large amount oimetal in the hubs and rim portions, as compared with the; web that if the wheel were to besubjected to'the same treatment throughoutt-he web would be cooled long before the remaining portions had been lowered in temperature to any substan-' tial extent. Accordingly, in our invention we provide means whereby the portions from which it is desired to most rapidly remove heat, namely the rim portions, are subjected to a more rapid engagement with the cooling medium than the other parts. The hub portion,from which it is desired to abstract heat rapidly, but not-so rapidly as the portions,

connection between the actuating are subjected to a lesser amount of the coolingv fluidand the web is provided with protection from the cooling agent to delay cooling as much as is desirable or practicable.

These purposes we accomplish by rapidly rotating the wheel so that therimportions pass through a bath of water, while simultaneously spraying portions of the rim and hub portions, and-protecting the web with shielding members.

Referring to the accompanying drawings for description of a specific embodiment of our invention: 1 i V Fig.. .1 is a transverse vertical section through the machine taken along the line IIofFig.2; w

Fig. 2 is a side elevation;

Fig, 3 is'a plan View;

Fig. 4 is a'view of the end ingthegate;

Fig. 5 is a detail view of-ione of the supporting rollers and partof the structure for changing the position thereof Fig. 6 is an end view of certain details of thr:i structure for operatingthe shieldplates an Fig. 7 is a perspective view of a. detail of the centering lock. 7

F g. 8 IS a longitudinal section plunger and showing the OI J'OHISTOWN,

of: the tank, showthe spindle for operating the shield plates,

this figure being on a larger scale than the showing of this structure in Fig. 1.

Fig. 9 is a view at right angles to that of v Fig. 8 of thesame structure, also being on an enlarged scale.

' The wheel 1 to be treated is adapted to be supported and rotated in tank- 2. This wheel is supported by rollers 3 and 3, roller 3be n'gkeyed to shaft 4, supported in bearings 5, and actuated by motor 6. This shaft is additionally supported by bearing structures 7, lands 8 being rovided to secureagainst feakage along tl ie shaft from the tank. Rollers 3 and 3 are grooved to a shape appropriate to thatof the shape of the rim of the wheel being treated.

Rollers 3 are mounted, one to each side of the wheel, and are adapted together with.

roller 3 to support and guide it.. They are .carried by arms 9 keyed to jshaftslO, which are rotatably mounted in bearings gles 12, bolted to side plates 13 of the tank.

11 on an- At the end of shafts are keyed arms 14 provided at their lower ends with slots 15 whichenga e trunnions 16 of the trunnion nuts 17. T ese trunnion nuts are seated in the space between ears 14 of arms 14 and have threaded engagement, internally thereof, with the

screw portions

18 and 19 of rod 20, these screw ortions being ri ht handed and left hande respectively. This adjusting rod is provided with a squared end 20, adapted to be engaged by a wrench for turning. Half way between arms 14, this rod, at a reduced portion 24 thereof, is seated in slot 21 of the projecting portion 22 of T member 22, fastened-at 23 to the tank. Adj acent the reduced portion 24 are the squared portions 24', forming shoulders which, abutting on opposite sides of the projection 22, act to hold the rod fromaccidental displacement in either direction. Rollers 3 can be adjusted in position to, accommodate wheels of varying sizes and, by means of the centering look just described, they are held firmly in any adjusted position.

I vA swinging spray pipe 25 is mounted so that water may be sprayed upon the outer portions of the wheel as it is being rotated.

pray nozzles 26 are positioned for spraying the more central portions of the wheel, particularly the hub 1". For rendering the abstraction of heat from the rim portions much more rapidthan in the remaining parts, the wheel is adapted to be rotated so that the rim is continually immersed in bath 27 in the tank. Water is admitted through pipe- 28 and gate 29 is provided at the end of the tank, sliding in uideways 30, for controlling the amount of iquid therein.- The opening 31 in the gate is at such a height that when the gate is closed water will flow therefrom when a height of the bath suitable for treatment of the wheel rim has been reached. This gate may be operated by any appropriate means, as for example by fluid pressure acting in the cylinder 32.

Guides 33 are provided on each side,.and somewhat above, the wheel for facilitating the placing of the wheel to be treated.

An important phase of our invention is the structure whereby the web of the wheel may be shielded from contact with the'coolmg medium. This consists essentially of an annular shielding ring'34, mounted upon the outer portions of splder 35, the inner portions of which areattached to spindle 36 which is rotatably connected with the end 37 of plunger 38. The shielding member is movable into and out of engagement with the wheel bymeans of plunger 38 actuated by fluid pressure in cylinder 39. This cylinder is supported'on the frame as follows: The

flanged annulus 42, secured to the frame, carries thesleeve 43; near theouter end of this sleeve is fixed the annular member 49, to which are'secured the inner ends of bolts 44,

the outer ends of these bolts assing through plate 45 which supports cy inder 39, bolts 44 passing through sleeves 44 which serve to

space members

49 and 45. End 37 of plunger 38 is provided with a constriction in which rotatively fits split ring 46 which is secured to the outer end of spindle 36, whereby longitudinal movement of the plunger gives a corresponding movement to the spindle.

End 37 of the plunger is rovided with a rounded bearing head 47 w ich is adapted to rotatively enga e the rounded bearing head 48 mounted wit in theend of spindle 36.

Spindle 36, during its longitudinal movement slides in the opening of the flanged annular member 40. This member 40 is prevented from longitudinal movement by means of members 41 which are secured to member49 but are spaced therefrom to provide the guide-way 50, whereby member 40 has a limited lateral play.

The fluid actuated cylinder 39 is of course a partly conventional showing, it being obvious that in an actual structure there are provided the usual means for causing an actuating flow of fluid to and from the cylinder. The operation and use of our device are more or less obvious. By means of a hoist, and aided by guides 33, the heated wheel is placed in position, rollers 3 being adjusted by turning rod 20. Next, the web shield is brought into position against the web by means of the plunger actuated by spindle 36 and spider 35. The

motor is set in operation and roller 3, by frictional engagement therewith, rotates the wheel, the Web shield alsorotating therewith.

Water is admitted into the tank to a suitable height, determined by the opening 31 on gate 29. The rotation of the wheel continually brings the material of the rim portions into contact with the bath. In addition water may be sprayed upon the rim or periphery of the Wheel and also upon the hub portions. The cooling of the web obviously is delayed because of it being shielded.

After the cooling of the wheel has been sufliciently completed the gate is raised to empty the. tank, the motor stopped, and the web shield withdrawn from engagement with the wheel.

Obviously, for certain (purposes thecooling ofthe rim may be effecte by rotation thereof in the bath alone, or, in certain cases b the spraying alone, or again, it may be a vantageous to cool partially by rotation of the wheel in the bath and then completin the cooling b means of the s ray, the bath eing lowered or this purpose y raising the gate.

Then, too, the device permits of shielding the web during a portion of the time of cooling of the other parts of thewheel, followed by a removal of a shielding member to permit of the application of the cooling medium to the web, so as to effect a positive but delayed cooling thereof.

Having described ourinvention what we desire to claim is as follows:

1. In a .device for cooling metal bodies of unequal conformation, rollers for supporting the metallic body to be treated, means operative throu h one of the supporting rollers to rotate the B ody, means for applying a cooling fluid to the rotating body, and means for shielding portions of the body during such application of cooling fluid.

2. In a device for cooling metal bodies of unequal coniormation, means for rotating the body being treated, means for applying fluid to the rotating body, a shielding means for portions of the body, and means operable during the rotation of the body for applying the shielding member to the body or removing it therefrom.

3. In a device for cooling metal bodies, a tank adapted to contain a cooling liquid, means for rotating an object to be treated so that a portion of the object is continually im mersed in the liquid, means for spraying cooling fluid on the rotating object, and-means for applying a shielding member to the object and removing it therefrom.

4. In a device for cooling metal bodies, a tank adapted to contain cooling liquid, rollers in the tank for supporting and guiding the ob ect to be treated, means operative through brought into or out ofengagement with the object during rotation thereof.

In testimony whereof I hereunto aflix my signature.

. EDWARD F. KENNEY.

In testimony'whereof I hereunto aflix my signature.

LOUIS H. WINKLER.