US649341A

US649341A - Drift-die and matrix for forming grooves in inner surfaces of tubes.

Info

Publication number: US649341A
Application number: US73527099A
Authority: US
Inventors: Henry Nevill
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-10-30
Filing date: 1899-10-30
Publication date: 1900-05-08
Anticipated expiration: 1917-05-08

Description

No. 649,34l. Patented May 8, I900.

n. NEVILL. DRIFT DIE AND MATRIX FOB FUR-"m6 GBUUVES "ER SURFACES 0F TUBES. (No Model.) (Apphmm med Oct-30, 1a 3 Sheets-Shoat I. Fig.

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Y I y W No. 649,34I. Patented May 8, I900. H. NEVILL. DRIFT DIEIAND MATRIX FOR FORMING GROIJVES IN INNER SURFACES 0F TUBES.

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Patented May 8, I900;

- No. 649,34l.

H. NEVILL. FORMING GBOOVES IN INNER SURFACES 0F TUBES. (Application filed Oct. 30, 1899.)

DRiFT M AND MATRIX FOR 3 Sheets-Sheet 3,

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Wifnesses.

t TED STATES PATENT OFFICE.

HENRY NEVILL, or SOUTHAMPTON, ENGLANI).

DRIFT-DIE AND MATRIX FOR FORMING GROOVES lN INNER SURFACES OF TUBE S.

SPECIFICATION forming part of Letters Patent No. 649,341, dated May 8, 1900.

Application filed October 30, 1899. Serial No. 735,270. (No modelil T0 (tZZ 1072 0721, it may concern:

Be it known that I, HENRY NEVILL, manufacturing engineer, a subject of the Queen of Great Britain, residing at Aukerwyke, Shirley W'arren, Southampton, England, have in vented certain new and useful Improvements in Drift Dies and Matrices for Forming Grooves in the Internal Surfaces of Tubes, of which the following is a specification.

My invention has reference to forming grooves or ways in the internal surfaces of malleable-metal or other malleable or ductile tubes, and has for its object to provide a tool whereby the grooves can be formed with great accuracy, speed, and economy of time as compared with the time occupied in cutting grooves in tubes with tools nowin use. The tool consists of two parts-a drift-die and a matrix. I attain this object by the apparatus illustrated in the accompanying drawings, in which-- Figure 1 is a vertical elevation of the driftdie. Fig. 2 is a sectional plan of the driftdie, taken at the line so m, Fig. 1. Fig. 3 isa seotional plan of the drift-die, taken at the line y 'y, Fig. 1. Figs. l, 5, 6, and 7 are elevations of difierent rollers used in the driftdie to form grooves of different section. Fig. 8 is an elevation of the drift-die which I use to finish the grooves after being formed by the drift-die shown in Fig. 1. Fig. 9 is a sectional plan of the drift-die shown in Fig. 8. Fig. 10 is a sectional plan of a modified form of the drift-die shown in Fig. 8. Fig. 11 is a vertical section of the matrix bolster and holder for use with the drift-die. Fig. 12 is a sectional plan of the matrix bolster and holder, taken at the line 2 .2 Fig. 11.

Similar letters refer to similar parts th rou ghout the several views.

According to this invention I provide the drift-die with a disk-shaped roller or a ribformer the edge of which corresponds in shape to the form of groove or flute required to be made in the tube and projects for the required distance beyond the surface of the shank of the drift-die. The drift-die may have one or more of these rollers or ribs. In the case of the rollers they are mounted on spindles and revolve in a slot or slots in the drift-die.

The drift-die works in a grooved cylindrical matrix-bolster of internal diameter to receive the tube to be grooved or fluted.

WVith reference to the drawings, a desigdates the shank of the drift-die, and b the head-piece by which it is driven or pressed by a suitable power or hydraulic press into the tube and matrix.

0 denotes the roller or rib by which the groove or flute is formed in the tube. The roller 0 is mounted on a spindle and revolves in a slot in the shank a. The edge of the roller or rib is round or rectangular, as shown in Figs. 4. and 5, or shaped as shown in Figs. 6 and '7.

Below the roller 0 and on the opposite side of the drift there is provided an antifriction-roller d, as shown in dotted lines, or a steel plate d may be let into the shank a. This roller or plate 01 bears on the side of the tube opposite to that on which the groove is being formed. 7

e denotes the matrix-bolster, and h the grooves therein. These grooves correspond to the extreme number and depth of the grooves or flutes to be formed in the tube.

t' denotes the tube in which the grooves are to be formed.

The matrix-bolster c has an internal flange at'the top, which projects partly over the metal of the tube, and an external flange by which it is held in an adjustable block 70, which is provided with a screw-block Z, which secures the bolster, and with a screw-block m, which holds and secures the tube 2'. The block 7c is carried or supported in the press by the bars n, which are provided with a stopbolt 1), which takes into holes q, formed in the block 70, which holes correspond with the grooves h in the matriX-bolsteia. v

.9 denotes handle-bolts by which the block 7c and matrix 6 can be moved around to bring the tube i into position for the roller 0 of the drift-die a to form the successive grooves in the tube 1'.

In operation the tube t' to be grooved or fluted is placed in the matrix-bolster e, which has first been secured in the block by the screw-block Z. a power or hydraulic press, in which it is supported by the bars at. The drift-die ct is then fixed to the plunger of theprcss and inserted The block 7c is then placed in in line with the roller 0, and a groove corre- 1 sponding in shape to the edge of the roller is formed in the tube. After the groove has been formed in the tube 11 the drift-die is withdrawn, and the block is, with the matrix e, is turned to bring another groove h opposite the roller 0, and a second groove is formed in the tube, and the operation is repeated until the required number of grooves have been formed in the tube 2'. After all the grooves have been formed the roller drifit-die is removed from the press, and a drift-die having a uumberof ribs corresponding to the number :of grooves isforced by the press into thetnibe i. This operation truesand finishes the grooves made by the roller 0.

The grooves or flutes are formed in the tube one at a time when the dri'fit-die has one disk roller-tool, and when the drift-die has two or moredisk roller-toolsa corresponding number of grooves or flutes are formed .at one stroke. Also the groove or grooves may extend only partly through or entirely through the tube, and the operation maybe perfiormed with the tube either in a cold or hot state.

A driftdie and matrix according :to my invention is particularly applicable for forming multiple grooves on the innersurface of tubes I to vtor-m 'hngiitud'inal hall-races for ball-bearings, also for forming keyways in the inner surfaces of tubes, and the use of the tool en- I ables the groove to be formed with great accuracy and economy of time as compared.

with the time occupied in cutting grooves with tools now in use.

Mydrift-die is adapted to operate upon the interior surface of the tube, the roller or- ,rollers forcing the metal outward into the I-Ieretofore and prior to my invention tubes have been grooved by external rolling corrugators which pressed the metal inward toward the-centerof the tube, thereby reducing the interior area of the tube. I make no claim .to any such construction.

What I claim, and desire to secure by Let= ters Patent, is- I 1. In the manufacture of metallic tubing, the com'binationwith a drift-die consisting of va :szhank' ha'vi-ng one or more rolls, each jour naled in a slot in the shank and projecting from said slot at a single point, of a matrix having a cylindrical opening to receive the tube, said opening being provided with grooves in its internal ilace, which grooves receive the OlliiWMdlY-lfiQROGd metal of the tube which is driven into them by the driftdie, substantially as described.

2. In the manufacture .of metallic tubing the combination with a drift-die, consisting of a shank having one or more rolls, each journaled in a separate .diametrical slot andpro ,jecting therefrom upon one sideot t-heshank, an antifiriction-plate bei n g secured $0 the opposite side, of a matrix having a cylindrical opening provided with one .or more longitudinal grooves to receive the metal of the tube forced outward by the drift die acting in the interior of the tube, substantially as de scribed.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit nesses.

HENRY NEVILL.

Witnesses FREDERICK J. .CHEESBROUG'H, ARTHUR JAMES LEA.