US984569A

US984569A - Rolling-mill for metal tubes.

Info

Publication number: US984569A
Application number: US55251710A
Authority: US
Inventors: Max Koch
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-03-31
Filing date: 1910-03-31
Publication date: 1911-02-21
Anticipated expiration: 1928-02-21

Description

M. KOCH. ROLLING MILL FOR METAL TUBES.

APPLICATION FILED MAR. 31, 1910.

- Patented Feb. 21, 1911.

- To all whom it may concern:

MAX KOCH, F RATINGEN, GERMANY.

ROLLING- MILL FOR METAL TUBES.

Be it known that I, MAX KOCH, a citizen of Germany, residing at Ratingen, Germany, have invented new and useful Improvements in Rolling- Mills for Metal Tubes, of which the following is a spec fication.

This invention relates to a rolling mill of novel. construction, more particularly designed for rolling out metal tubes.

- In the accompanying drawing: F gure 1 is an elevation partly in section of a rolling mill embodying my invention, and Fi 2 a similar view showing the parts in a different position.

In the machine frame are journaled two sets ofrolls a, aand b, I), placed at a distance from each other, and adapted to be rotated in opposite directions. The upper rolls a, b, are adapted to be reciprocated vertically by a hydraulic piston through double rack z, pinions 1' and spindles g, in such a manner that when one of the rolls rises,

the other roll descends. With each roll pair cooperates a mandrel (Z, 03' adapted to be reciprocated by friction rollers f, f and to be locked in position by pin '0, so that it will not be retracted during the rolling operation. Intermediate the machine frame and rollers f, f there are arranged below mandrelscZ, d a pair of troughs e, e that serve to support the workpiece when the mandrels are withdrawn therefrom.

The tube to be'rolled is adapted to be advanced by pushers t, 25 depending from car riages i, which travel on transverse beams z" and which are reciprocated by an electro-- moto'ror similar device 7'. Upon the inner ends of mandrls d, d are'adaptedto be removably fitted a pair of bulged heads h, h, which may be readily slipped on or off the mandrels.

lVith the position of parts indicated Fig. 1 mandrel' df is retracted, roll Z2 is raised, roll a islowere'd, mandrel (Z with its head h being projected between rolls a, a. The work piece. is then placed into right hand trough e and pusher t is started to advance the work piece toward rollsa, va

with the rolls, the mandrels,

Specification ofLettersI atent. Patented Feb. 21, 1911; Application filed March 31, 1910. Serial No. 552,517. 7 1 i v which will thus roll it over head h. Ma1idig-cl d is then advancedand locked by a pin similar to the in 0 shown on'the left of Fig. 1, head 7:. 1s fitted on the mandrel, roll a is'raised,'and roll 6 is lowered.- The pusher v2f will nowadvance the work piece toward rolls 6,6 thereby stripping head It 70 below the machine frame. The work piece is thusrolled by rolls b, 5 over head h, which operations are repeated until the tube has acquired the thickness desired. If the finished tubeis to be removed, lock pin '0 is withdrawn and the mandrel carrying the tube is retracted, during which manipulation the head 72. or 72. is stripped off same.

It willbe seen, that with my improved rolling mill the mandrels donot require any attendance, as they remain stationary during the 'reciprocative movement of the work piece. The manipulation is limited to fitting new heads or refitting the previously slipped off heads to the mandrels and to operating the top rolls and pushers. In this way the operation of the mill is greatly facilitated, while time and labor are economized. l

I claim:' a

lfA rolling millcomprising two sets of respectively vertically alined cooperating 80 rolls, means for rotating said roll sets in op.- posite directions, means for alternately lowering and raising the top rolls of said sets, a pair of axially alined mandrels cooperating with the rolls, and heads loosely mounted upon the mandrels.

2. A rolling mill comprising two sets of ofi' mandrel at said head falling into the pit respectively vertically 1 alined cotipera'ting rolls, means for rotating said roll sets in op posite, directions, means for alternately low ering and raising the 'top rollsof said sets, apair of axially alined mandrels cooperating and means for axially displacmg the mandrels.

MAX KOCH. |'L. s.]

Wltnesses: l

IVALTER VoNNEGU'r, A. Posnw.

heads loosely mounted upon