JPS59140331A - Heated tube-form workpiece quenching device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for quenching heated tubular products, and more particularly to its use in connection with mobile induction heating of said tubular products.

One accepted method for heat treating tubular products, as best illustrated in U.S. Pat. No. 3,476.901, is to transport the product through an induction coil or other After heating the product by passing it through the heating equipment, the water ejected from the induction coil and later from the net-type device is a device in which the water is ejected into the heated zone.

U.S. Pat. No. 2,776,230 discloses a number of fixed spray rings or loops, each provided with a number of nozzles, each nozzle angled so as to be placed at an angle in the path of a tube passing through it. Discloses that it will be used. Water is supplied via headers spaced one space apart, one header on each side of the tube and parallel to the path of travel of the tube.
The main tubes and branch tubes are connected to the laterally curved ends of the headers. Rings or loops arranged approximately perpendicular to the header are provided with means adapted to fit into notches in the header and are secured integrally thereto and in equidistant relation to each other. Positioned.

To ensure uniform cooling of tubular products over a wide range of dimensions and composition, U.S. Patent No. 42941.19
Hardened cylinders provided with drilled holes have also been used, as disclosed in No. 9.

Such prior art devices are limited in their scope of use and adjustment.

There is a wide range of tubular products on the market that must be heat treated to obtain enhanced properties for use in many applications.

Many of these heat treatments require quenching from high temperatures. The rate of quenching is determined by such things as the composition, diameter, wall thickness, and desired properties of the product being heat treated, and is further influenced by the production capacity at which the heat treatment is performed.

Proper hardening is also complicated by the eccentricity of the inner diameter with respect to the outer diameter or the presence of thicker or thinner walled sections in the longitudinal direction of the product.

The present invention provides a flexible means by which a wide range of these product variables can be accomplished within a single hardening zone.

The present invention allows use for hardening tubular products of different sizes and for centering the product and allows for variations in the length of the spray zone and the intensity of the spray at any point inside the spray zone. A number of annular or ring-shaped quenching devices are provided that are vertically and horizontally adjustable so as to vary the temperature. Additionally, each annular quench ring is provided with a separate valving system to allow individual adjustment of the amount of quench fluid from each annular quench ring.

Individual positioning for individual control of the intensity of the blowout from each of the multiple annular quenching rings allows the user to best apply the quenching fluid to the product.

One object of the invention is to improve the hardening conditions of heat treatment of tubular products in connection with mobile heating of the tubular products.

An improved hardening apparatus adapted for use with tubular products of various diameters is provided.

It is another object of the invention.

Still another object of the present invention is to provide improved hardening applications for hardening carbon steel or alloy steel tubular products of various sizes and compositions and for certain annealing treatments of stainless steel. It's all about getting the equipment.

Another object of the invention is to provide a hardening device which provides uniform cooling in the circumferential direction of a particular tubular workpiece passing through it.

Yet another object of the present invention is to provide reproducible product cooling capabilities for a wide range of product sizes and production capacities.

Yet another object of the invention is to obtain an adjustment of the hardening area provided by a number of individual spray means for the treatment of tubular workpieces of different dimensions and composition.

Yet another object of the invention is to provide a means for venting quenching fluid to reduce interference with downstream quenching.

Furthermore, it is an object of the present invention to have an improved means for varying the intensity of the spray applied to a workpiece passing through a separate spraying means.

Another object of the invention is to provide the possibility of cutting off the quenching fluid from any one of a number of quenching rings at any time, so as to adapt to the shape of the product as it passes through any part of the quenching zone. It's about getting.

It is believed that other objects of the invention, as well as the invention itself, will become readily apparent upon reference to the following description and accompanying drawings. It should be noted that in all the drawings, like parts are given like reference numerals, but it is shown that the quenching device 10 according to the invention moves through a section of a tubular article, such as a tube l-. In relation to the conveyor //
Shown in a typical environment, the conveyor // also has a number of powered support rollers 13 shown in FIG. 3 and an L-shaped support roller shown in FIG. Channel l on overhead carriage lj1 by bracket 1-/A! The tube /2 is adapted to move through a number of annular hardened tubes /+ which are adjustably mounted on the r. Through bracket/6, bracket/A
Projecting is a bolt member provided with an adjustable thread, secured by a nut/g. The head of the bolt 17 is seated inside the channel. The annular hardening rings /4', by their connection to the carriage /&', are made to be adjusted simultaneously by the handle members 2 and to center tubes of different diameters therein. The support rollers 13 are provided to axially support, propel and rotate the tube or other tubular workpiece/2; these support rollers 13 are power driven. You can also do that. In use, the arrangement of multiple annular quenching rings/rings according to the invention can be spaced apart when the entire length of the quenching area requires that the workpiece be supported to prevent its "sagging". Note that it allows additional support to be placed in appropriate locations between the placed annular hardening rings /&. Furthermore, each of the annular hardening rings/4' is provided with only one inlet port θ.
are, in the illustrated embodiment, arranged substantially tangentially to the circular axis of each ring or annular vessel, each having a number of spaced apart outlets 21. distributed around the circumference and preferably inclined in the direction of downstream movement of the workpiece or the like so that the spray impinges on the product surface at an acute angle, as shown. It is also noted that it is provided with a number of outlets 21, such as nozzles or the like.

Each of the annular hardening rings/4' has a diameter "A" that is substantially the same as the diameter rBJ of the inlet conduit.

The total area of all the spray outlets 2/ placed around the periphery of each annular hardening ring/g is preferably smaller than the area of the annular hardening ring/4'.

Each annular hardening ring /4' must be adjustable but rigidly mounted on the bracket /6, bracket: t.

Note that the interior of the channel /S is made to move by loosening the bolt member /7 securing the bracket 16.

The flow of fluid into the conduit or fluid port θ for each ring/4' is controlled by a suitable separate fluid control member or valve λ6, so that each control member or valve 6 is individually regulated; The intensity of the spray dispensed from the nozzles of the separate rings can be varied. Therefore, each ring of the multiple ring assemblies or loop assemblies is individually adjusted horizontally along the carriage/6 to determine the length of the quenching area as desired for the tube or tubular workpiece being passed through. and, as mentioned above, the spray intensity is varied by the adjustment of separate valve means provided for each ring at any point located inside the quenching zone. be able to. Since the products to be hardened span a wide range of dimensions and composition variations, the hardening area can be adjusted to provide cooling that is tailored to the requirements of the particular workpiece being processed. It is possible.

Annular hardened ring attached to carriage 15”
A horizontal individual adjustment of q allows a richer analysis (higher hardenability) and/or a less intense hardening for workpieces with non-uniform wall thickness. This allows the quenching area to be widened, as shown in FIG. For heavier tubular workpieces that are traveling, they allow for closer spacing, as shown in FIG. For horizontal installation of individual spaced rings llI on the carriage /l', the fifth and seventh
As best shown in the figure, it is possible to allow the insertion of additional support rolls inside the hardening zone when necessary to prevent "sagging" or loss of straightness of the traveling workpiece. be made into

The annular quenching rings/l can also be placed in close proximity, as shown in Figure 6, to process thinner wall thickness workpieces at slower speeds, thus making Figure 6 the most As best shown, a relatively short span can also be allowed between the support rolls 13 which are external to the annular hardening ring/lI both at the front and at the rear of the hardening zone.

Similarly, the spacing of the annular quenching ring/& is designed to provide reproducible workpiece cooling rates at different production capacities for a wide range of different sized workpieces.
It can also be changed.

Eventually, the annular quenching rings /4' are individually supplied with quenching fluid, and their volumes are equal to that of the individual valves.

That is, it is adjustable by a valve installed at the inlet of each ring as indicated by 2B. This adjustment is required for lower hardenability workpieces than quenching.

For workpieces of a more 1° resolution (higher hardenability), less intense cooling allows this.

In the case of hardened workpieces with eccentric internal diameter, the longitudinal part of the annular hardening ring/g and/or the intensity of the spray from it is 1. Adjustments can be made as necessary to achieve the desired properties with minimal distortion of the workpiece.

In mobile quenching of tubular workpieces by conventional quenching means, quenching fluid can enter the tubular workpiece as the rear end of the workpiece passes through the quenching zone. In contrast, in the case of the multiple individually opened and closed annular hardening rings/I of the present invention.

This is done by cutting off certain annular hardening rings/4' in critical areas.

This arrangement can also be appropriately programmed to achieve this.

Although the invention has been described in conjunction with preferred embodiments thereof, it will be obvious that numerous and extensive modifications may be made thereto without departing from the spirit of the invention.

[Brief explanation of drawings]

FIG. 1 is a front view of the improved annular hardening ring of the present invention and the tangential inlet therefor; FIG. 2 is a front view of a number of annular hardening rings cooperating with the present invention; The ring in FIG. 1 shows the stream of spray ejected from it. FIG. 3 is a diagram showing the conveyor and the annular quenching ring hardening device of FIGS. FIG. 3 is an enlarged view of a portion of the ring of FIG.
FIG. 6 is a front view showing a number of quenching rings in relatively widely and equally spaced relation to each other and to a tubular workpiece passing therethrough; FIG. , a front view similar to FIG. 3 but showing a number of hardened rings in closely spaced relation to each other; FIG. 7 is similar to FIGS. FIG. 3 is a front view showing a number of hardening rings in non-uniformly spaced relationship with each other. io...quenching device;l/...conveyor;/j--tubular workpiece;/3,9 support rollers;/ri...annular quenching tube;/S...groove material;t tl...carriage; 16
・・Bracket;, 20・・Inlet; 2/--Exit. -～-One!゛-1 Procedural Amendment Form C] March 13, 1980 Dear Commissioner of the Japan Patent Office 1, Indication of the Case, Patent Application No. 21'1939, 1953, 2, Title of Invention: Quenching device for heated tubular workpieces 3. Relationship with the case of the person making the amendment Name of patent applicant: Ajax Magnesarmic Corporation 4, Agent

Claims (1)

Claims: l An apparatus It for spray hardening a continuously moving substantially horizontal induction-heated tubular workpiece, comprising a number of concentrically arranged around said workpiece. An annular quenching ring is provided, each of said annular quenching rings having a quenching fluid inlet and a number of fluid outlets spaced around the annular body for directing the quenching fluid to the workpiece in the direction of movement of the workpiece. It is placed on the outer surface of the piece and oriented at an acute angle to it. Further, each of the annular quenching rings has a force of 1
individual control means are provided for adjusting the intensity of the spray ejected from the annular quenching ring or for cutting off the quenching fluid from selected rings; A device characterized in that it is individually adjustable mounted on the carriage l for individual longitudinal movements of said rings so as to individually vary the spacing between said hardening rings. 2. Apparatus according to claim 1, wherein each annular hardening ring is provided with an individual control member for adjusting the intensity of the spray stream emitted therefrom. 3. Apparatus according to claim 1, characterized in that means are provided for adjusting the vertical positioning of the annular body in order to center the annular body around tubular workpieces of different sizes passing therethrough. Apparatus according to claim 1, characterized in that the workpiece is rotated continuously. A support means for the workpiece is interposed between selected adjacent variably spaced annular bodies to maintain the straightness of the workpiece as it passes through the spaced quenching zones. An apparatus according to claim 1, wherein the apparatus is adapted to: 2. The device according to claim 1, wherein the inlet for the quenching fluid is arranged tangentially to the annular body. 2. The device of claim 1, wherein the total area of the fluid outlet in each toroid is smaller than the area of the fluid inlet opening into the toroid.