US1374369A

US1374369A - Tool for piercing billets

Info

Publication number: US1374369A
Application number: US286202A
Authority: US
Inventors: Luther D Earl
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-03-29
Filing date: 1919-03-29
Publication date: 1921-04-12
Anticipated expiration: 1938-04-12

Description

L. D. EARL.

TOOL FOR PIERCING BILLETS. APPLICATION FILED MAR.29, 1919.

Patented Apr. 12, 1921.

3V I t 4 UNITED STA ES PATENT; orrics.

LUTHER ID. EARL, OF SHELBY, OHIO.

TOOL FOR PIERCING- BILLETS.

To all whom it may concern.

Be it known that I, LUTHER D. EARL, a citizen of the United States, residing at Shelby, in the county of Richland and State of Ohio, have invented a certain new and useful Improvement in Tools forPiercing Billets, of which the following is a full, clear, and exact description, reference'being had to the accompanying drawings.

This invention relates to too s for piercing billets and has for its'general object to provide such tools with points which will increase the efficiency thereof. More limitedly the object of the invention is to provide a point having an efficient means for cooling the same; also to provide a point the shape whereof will facilitate and .promote the piercing operation. I accomplish the foregoing objects in and through the construction shown in the drawings forming part hereof, wherein Figure 1 represents a sectional view through a portion of a billetpiercing tool, the billet with which it cooperates being shown in elevation; and Fig. 2 an enlarged detail in elevation of a portion of the point of such tool.

Describing the various parts by reference characters, 1 denotes a portion of a billet, which may be formed into a seamless tube, and 2 a hollow bar or shank forming a part of the tool. At its forward or work facing end, it is provided with the point which pierces the billet in the process of forming a tube or other object therefrom. This point comprises generally a body member 3 and a detachable point member, indicated at 4%. The rear end of the body member 3 is reduced, as shown at 5, to form a close fit within the frontend of the bar or shank 2, to which it may be secured as by a pin 5% Intermediate of its ends, the member 3 is enlarged, as shown at 6, the front and rear of such enlargement providing shoulders, the rear shoulder, indicated at 7 forming an abutment for the point proper. Extending forwardly from the front shoulder is an externally threaded portion 9; in front of of this threaded portion there is provided an annular channel, and from this channel 10 the front portion of the member 8 is tapered or frusto-conical in shape, as shown at ,11. Grooves 12 extend longitudinally of the frusto-conical surface, communicating at their rear ends with the channel 10 and at their front ends with a chamber formed within the point member. From the an- Specification of Letters Patent. Patented Apr, 12, 1921. Application filed March 29, 1919. Serial No. 286,202.

nular channel, ports 13 extend to a central bore 14 provided within the body This bore 1s contractedat its forward end in order to form a close fit with a tube 15, whichextends through the hollow bar or shank 2 and entirely through the bore 14: and the reduced front thereof.

The point member, indicated at 4, is generally tapered from rear to front and is provided at itsfront end with a rounded knob P. The inner wall of the point member is so shaped as to conform to the

parts

9 and 11 of the body 3, the rear end of the wall being threaded upon the portion 9 of said body. From this internally threaded portion, the inner wall of the point member is tapered or frusto-conical whereby, when screwed home upon the body 3, it forms a tight fit with the exterior surface of the portion llthereof. In front of the tapered end of said body, the point member is provided with a chamber 16 into which the front end of the tube 15 projects. In operation, a cooling fluid, such as water, will be supplied through the tube 15 into the chamber 16 whence it will flow through the channels provided by the interior of the point member and the grooves 12 to the annular groove 10 and thence through the ports 18 to the enlarged portion of the bore 1 1 and through the interior of the hollow bar or shank 2.

By this arrangement of parts, the. working. end or point of the piercing tool is effectively what I claim is 1. In a tool of the character described, the combination of a hollow bar or shank, a chambered point at the forward end of said bar or shank, a fluid supply extending to the chamber of said point, and a plurality of passageways in said point communicating with the chamber and conducting fluid therefrom in cooling relation to said point.

2. In a tool of the character described, the combination of a bar orshank, a connecting body at the forward end of said bar or shank, a chambered point detachably mounted on said body, a fluid supply extending through said body and communicatingwith the chamber ofsaid point, and a plurality of passageways in said body communicating with the chamber and conducting fluid in front of said tube, and passageways communicating with said chamber and extending rearwardlydherefrom and communicating with the enlarged portion of said bore.

4. In a tool of-the character described, the combination of a bar or shank, said bar or shank having at its forward end a tao a. A 1

pered body, said tapered body being provided with a bore extendingtherethrough and reduced at its forward end, a tube extending through said bar or shank and said bore and forming a close fit with the contracted forward end thereof, a point detachably connected to said body and forming a close fit with the tapered end thereof and having in front of such tapered end and offsaid tube a chamber, ports being formed between the inner tapered wall of said point and the outer tapered wall of said body, an annular channel with which the said 'ports communicate, and ports extending from said channel and communicating with the enlarged portion of said bore.

5.' In a tool of the character described, the combination of a bar or shank, a tapered point thereon, the said point havin therein a plurality of passageways extendin longitudinally thereof and in coolin re ation to the outer tapered surface thereo and connections for circulating fluid through said passa eways.

6. na tool of the character described, the combination of a shank or bar, a tapered point carried thereby, said point having a plurality of passageways therewithin and extending substantially parallel with the outer tapered surface thereof, the said point having'a chamber inits front portion with which said passageways communicate, means reraeee :for conducting fluid to such chamber, and a 7, Ina tool of the character described, the

combination of a bar or shank, said bar or shank having at its forward end a body provided with an external thread and with a frusto-conical projection in front of such thread, the said body being provided with a bore which is reduced at its forward end, a tube within said bar or shank and fitting closely within the contracted portion of the said bore, a point having an internal thread cooperating with the thread of said body and having a frusto-conical inner wall adapted to contact with the frusto-conical wall of said body andprovided with a chamber in front of said body, the said body being provided with a pluralityof grooves in the frusto-conical wall thereof and extending longitudinally of suchbody communicating at their front ends with said chamber and at their rear ends with an annular groove provided in said body at the rear end of the frusto-conical wall thereof, there being ports extending from said groove in-.

wardly to the enlarged portion of saidbore.

8. In a tool of the character described, the combination of a bar or shank, said bar or shank having at its forward end a tapered body, said tapered body being Iprovided with a bore extending therethroug a point detachably connected to said body and form- ,ing a close fit with the tapered end thereof and having a chamber in front of such tapered end, ports bein formed between the inner tapered wall 0 said point and the outer tapered wall of saidbody, and means for circulating a fluid through said bore,

' chamber and ports.

9. A tool of the character described having a tapered point provided at its forward end with a rounded knob or projection.

In testimony whereof I hereunto aifix my signature.

LUTHER n. EARL;