US2367898A - Flame hardening head - Google Patents

Description

Original Filed Nov. 4, 1940 INVENTOR.

E'TH

Patented Jan. 23, 1945 UNITED STATES PATENT OFFICE FLAME HARDENING HEAD Harry E. Spieth, Portland, Oreg.

Substituted for abandoned application Serial No.

364,115, November 4, 1940.

This application 2 Claims.

in communication with swingably mounted and adjustable water and gas jets which are readily adjustable with respect to the work being dealt with. lhe water and gas ducts are in open com munication through a single inlet with sources of supply of water and gas.

These and other objects will appear as my invention is more fully hereinafter described in the following specification, illustrated in the accompanying drawings, and finally pointed out in the appended claims.

In the drawing:

Figure 1 is a perspective view of a shaft mount-' ed for rotation in a lathe or other machine and showing my invention in operative position with respect thereto.

Figure 2 is a side elevation of the hardening and quenching head with a fragment broken away for convenience of illustration.

Figure 3 is an edgewise view of Figure 2.

Figure 4 is an enlarged sectional view through the hardening and quenching head illustrating the manner in which the jets are swingably mounted with respect to the head and adapted to be brought into and out of communication with the water and gas ducts.

Figure 5 is a sectional view taken on the line 55 of Figure 4.

Figure 6 is an enlarged detail View of the water and gas jets.

Figure Z'is a side elevation of Figure 6.

Figure 8 is a detail front elevation of a modified form of water and gas jets.

Figure 9 is a side elevation of Figure 8.

Referring now more particularly to the drawmg:

In Figure 1 reference numeral l indicates pieces of work being dealt with which in this instance is a shaft centered as at 2 at one of its ends in a lathe and engaged with the lathe at its opposite end by means of a dog 3 in the usual manner and adapted to rotate in the direction of the arrow applied to the shaft. The hardening and quenching head is generally indicated at 4 and consists of a ring having. two flat sides 5 and 6 and flat inner and outer peripheries l and 8 respectively. The interior of the ring is formed with two concentric water and gas ducts 9 and ill respectively which are in open communication with a threaded nipple i i adapted for connection with a feed pipe to supply water and gas to the ducts 9 and i0.

A plurality of nozzles generally indicated at l2 are swingably mounted to the ring 4 and. are preferably equally spaced with respect to each other. Each nozzle is swingably mounted to the ring by means of a tapered shaft 13 threaded at one of its ends as at M to receive a locking nut I5. outwardly from the side wall of the ring and is suitably ap-ertured to receive a pair of hollow tubes 16 and H. The tube 16 by means of a duct l8 formed in the shaft i3 is adapted for open communication with the gas duct it). Similarly the tube I! by means of duct I9 is adapted for communication with the water duct 9. The shaft is relieved as at 20 and 2| at diametrically 0pposed points to provide sufficient space to insure a free flow of gas or water from the ducts in the ring to' the ducts i8 and [9. The tapered portion of the shaft I3 serves as a valve with respect to the ducts 9 and I0 so that the flow of water and gas into the ducts i8 and [9 may be controlled by rotation of the shaft with respect to the ring 4.

For example, when the tubes or nozzles l 6 and H are swung inwardly to the work being dealt with the ducts i8 and [9 are in communication with the ducts 9 and it! and the water and gas is flowing freely through the nozzles, but when the nozzles are swung outwardly with respect to the rin 4 as shown in Figure 2 the flow of water and gas is cut off by the tapered portion of the shaft l3.

In Figures 6 and 7, I have illustrated one form of nozzle which comprises a tip 2'12 having a single orifice 23. In Figures 8 and 9, 1 illustrate a modified form of nozzle which consists of a tip 24 formed with a plurality of orifices 25.

In hardening metal with my invention the depth of hardness is governed by the amount of heat put into the object being hardened and is I controlled by the amount of oxygen or acetylene supplied to the nozzle or nozzles, and by adjusting the speed at which the flame jets travel. The degree of hardness obtained depends on the rate of quenching which is governed by the type of quenching mediumwater, compressed air, etc.and by the volume of such quenching used. A simple trial easily determines the correct setting for torch speed, gas flow, and

The opposite end of the shaft l3 extends rate of quenching, to secure the degree of hardness and depth of penetration desired.

The object being hardened rotates in the direction of the curved arrow in Figure 1, while the hardening head moves horizontally from one end of the work to the other. The adjustable mounting of the nozzles with respect to the ring renders the device capable of applying various amounts of flame or water to the object to be hardened. A maximum amount, of course, may be applied when all of the nozzles are swung inwardly toward the object to be hardened and each of the nozzles may be located in any of their adjusted positions by advancing the nut l5 on the threaded end M of the shaft l3.

While I have shown a particular form of embodiment of my invention I am aware that many minor changes therein will readily suggest themselves to others skilled in the art without departing from the spirit and scope of the invention. Having thus described the invention, what I claim as new and desire to protect by Letters Patent is:

1. Flame hardening apparatus comprising a ring member having water and gas ducts formed internally therein, means for connecting said ducts with sources of supply, a plurality of water and gas nozzles arranged in pairs and each pair being attached to a valve body rotatably mounted in the ring and adapted to control communication between the ducts and nozzles, and means for locking each of said valve bodies in various positions.

2. Flame hardening apparatus comprising, a ring member having water and gas ducts formed internally therein, means for supplying said ducts with gas and quenching fluid, respectively, a plurality of valve-rotors mounted in said ring member and formed with gas and fluid ducts adapted to be moved into and out of communication with the respective ducts of said ring member, and pairs of gas and fluid nozzles connected to said valve-rotors and communicating with the respective ducts thereof, the ends of said nozzles being adjustable through arcs intersecting at the ring center.

HARRY E. SPIETH.

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