US1936019A - Apparatus for rolling seamless hollow bodies - Google Patents

Description

Nov. 21, 1933.v PQ HORBACH Er AL APARATUS FOR ROLLING SEAMLESS HOLLOW-BODIES Filed April 15, 1951 x f i rfl.

Patented Nov. 2l, '1933 UNITED STATES APPARATUS FOR ROLLING SEAMLESS HOL- LOW BODIES Peter Horbach, Dusseldorf -Eller,

Simoneit, Dusseldorf,

and Karl Germany, assignors to the lrm Vereinigte Stahlwerke Aktiengesellschaft, Dusseldorf, Germany Application April 15, 1931, Serial No. 530,406, and in Germany April-28,1930

7 claims. (c1. zzo-13) In rolling mills which are used for the production of seamless hollow bodies of iron, steel or* other metal tubes the axes of both co-operating discs lie in the same plane. By corresponding o calibration of thev discs the pressing or rolling out of the blanks or work-pieces is effected, the longitudinal movement of the work-piece or blank when rolling, is effected in such a way that the rolling takes place ata certain distance above or below the plane of the rolling axes. The exact maintenance of this for a certain tube measurement is established by suitable guides rmly built in. For constructive reasons the usual operation of rolling is generally effected under the middle plane that is, the plane of the rolling axes. At a given rotation-direction of the rollers or discs, the direction of the longitudinal movement of the blank to be rolled with the rolling process, is reserved according to whether it is registered above or below the middle plane of the rollers. Hitherto if it were found necessary to move the blank or work piece back to the operating side, expensive devices for moving the blanks had to be employed which required minute handling.

l According to the present invention however,

the disc rolling mill is itself employed for the return movement of the blank or work-piece in such a way that the said blank or work piece, after rolling or pressing has been effected in one direction, is carried back parallel to the forward movement by the discs themselves, by registering in an axis which lies opposite the middle p lane a second guide being provided for guiding the blank or work-piece.

By the arrangement ofa second mandrel on Y the other side of the central plane of the rolling mill, it is possible as a further development of the invention, not only to move the blank or work-piece in the opposite direction but also to lroll it .in the reverse direction. 1t will be clearly understood that by this means blanks can either be pressed or rolled in both directions simultaneously or a blank can be rolled in one direction and then be subjected to a further course of rolling or pressing on the return movement. Nothing stands in the way, in doing so, to work also simultaneously in both directions. Therefore it will be seen that according to the present invention, either a greater output results or a more completely rolled tube piece is obtained without the necessity of subjecting the partially rolled tube to another machine for fur# ther rolling, that is to say, a thin tube can be produced immediately on the present disc rolling mill from a complete blank or billet and can then be conveyed to a finishing plant such as smooth rolling mills, mass rolling mills or reducing roller mills. The great economic advantages which are obtained by a disc rolling mill according to the present invention, are evident without further explanations. y

The additional devices consist in the arrange-- ment of a second mandrel on the hitherto free side of the rolling discs of the rolling mill with the appertaining mandrel rod, the portable mandrel resistor, a guide body provided with two guide openings betweenthe rollers, and a rotary guide with two or more guide openings at a suitable distance from both rolling axes on the one side or also on both sides of the rolling discs of therolling mill.

The accompanying drawing illustrates by way of. example, one particular construction of the present invention.

In the drawing Figure 1, shows a section through a rolling mill in which the blank or rolled blank is returned .without being subjected to further rolling.

Figure 2 is a section through a rolling mill for rolling in both directions.

Figures 3 to 3c show Various views and sections of the local Aguide between the rollers.

Figure 4; is a rotary guide with two guide passages.

Figure 5 a similar one with three guide passages.

In operation the blank or work piece coming from the furnace, heated to rolling temperature is pushed in through the lower inlet guide. m into the lower local guide i of the guide-body a, and rolled or pressed between the discs c and d and the mandrel b. The rolled-,out end of the blank or work-piece enters the guide passage p of the rotary guide g. After the rst rolling process the blank or work-piece is drawn completely into the rotary guide by the returning mandrel. After the exit of the mandrel rod f out of the rotary guide body g the latter is rotated so that the rolled-out blank, now in the form of a shell lies in front of the upper local guide i1; the free guide-passage p1 has then adjusted itself in front o f the lower local guide i. The Work-piece lying in front of the upper local guide 121, is pushed into it, and subjected to a further rolling process between the discs c and d and the mandrel h. The rolled out tube then passes, as described above, into the outlet guide n. At the same time the lower mandrel-rod f is brought in again with the freshly applied man- 110 drel head b between the rollers, so that a new blank or work-piece can be simultaneously pressed or rolled. After drawing back the mandrel rod k the outlet guide n is opened and the tube rolled out during the return movement, is ejected by lever mechanism and, as previously, conveyed to the further finishing process.

What we claim and desire to secure by Letters Patent is:

1. Apparatus for rolling seamless hollow bodies, comprising a pair of rolling discs provided with inclined work engaging surfaces, between the oppositely disposedcooperating edges of which the tubes are rolled, two tube rolling mandrels associated with the rolling discs, local guides for directing the blanks on to the mandrels, inlet and outlet guides for directing the blanks to and from the local guides, the inlet and outlet guides being arranged to form two sets of coaxial guiding passages for the blanks, and those on one side of the discs being coupled together in parallel, and means provided for reversing the positions of the said coupled guides with reference to the local guides. y

2. Apparatus for rolling seamless hollow bodies, comprising a pair of rolling discsprovided with inclined work-engaging surfaces between the oppositely disposed cooperating edges of which the tubes are rolled, two parallel tube rolling mandrels associated with the rolling discsA to operate in opposite directions, local guides for directing the blanks onto the mandrels, inlet and outlet guides for direct-ing the blanks to and from the local guides, a rotary-guide carrier, the carrier being arranged to support two of the inlet and outlet guides in parallel and coaxial with the respective mandrels and means for rotating the rotary guide carrier to reverse the positions of the two inlet and outlet guides.

3. Apparatus for rolling seamless hollow bodies, comprising a pair of rolling discs which engage the blank between bevelled edges and set the blank in rotation during axial advancement, a guide body arranged between the rolling discs and having two hollow and stationary guides foi guiding twov blanks simultaneously in different rolling planes and directions and a rolling mandrel arranged in the longitudinal axis of one of the guides.

4. Apparatus for rolling seamless hollow bodies, comprising a pair of rolling discs which engage the blank between bevelled edges and set the blank in rotation during axial advancement, a guide body arranged between the rolling discs and having two hollow and stationary guides for guiding two blanks simultaneously indifferent rolling planes and directions and a rolling mandrel arranged in the longitudinal direction of one of the guides, and a guide body having longitudinal guides and adapted to receive the blank passing out of the rolling discs and adapted to rotate on its central longitudinal axis, the longitudinal guides of the said guide body being spaced from the central axis to the same extent as the said guiding members. are arranged between the rolling discs, so that one of the said longitudinal guides may receive a blank while the other is feeding another blank to the pass on the other side of the rolls.

5. lApparatus for rolling seamless hollow bodies, comprising a pair of rolling discs which engage the blank between bevelled edges and set the blank in rotation during axial advancement, a guide body arranged between the rolling discs and having two hollow and stationary guides for guiding two blanks simultaneously in diierent rolling planes and directions, and a rolling mandrel arranged in the longitudinal axis of one of the guides, and a further rolling mandrel arranged in the longitudinal axis of the other guide and acting in an opposite direction.

6. Apparatus for rolling seamless hollow bodies, comprising a pair of rolling discs which engage the blank between bevelled edges and set the blank in rotation duringy axial advancement,

a guide body arranged between the rolling discs and having two hollow and stationary guides for guiding two blanks simultaneously in different rolling planes and directions and a rolling mandrel arranged in the longitudinal axis of one of the guides, and a further rolling mandrel arranged in the longitudinal axis of the other guide and acting in an opposite direction, and a guide body having longitudinal guides and adapted to receive the blank passing out of the rolling discs and adapted to rotate on its central longitudinal axis, the longitudinal guides of said guide body being spaced from the central axis to the same extent as the said rolling mandrels, so that one of the said longitudinal guides may receive a blank while the other is feeding another blank to the pass on the other side of the rolls.

7. Apparatus for rolling seamless hollow bodies, comprising a pair of rolling discs which engage the blank between bevelled edges and set the blank in rotation during axial advancement,

a guide body arranged between the rolling discs and having two hollow and stationary guides for guiding two blanks simultaneously in dierent rolling planes and directions and a piercing mandrel arranged in the longitudinal axis of.one of the guides, and a rolling mandrel arranged in the longitudinal axis of the other guide and acting in the opposite direction, and a guide body having longitudinal guides and adapted to receive the blank passing out of the rolling discs and adapted to rotate on its central longitudinal axis,-the longitudinal guides of said guide body being spaced from the central axis to the same extent as the said rolling mandrels, so that on`e of the said longitudinal guides may receive-a blank while the other is feeding another blank to the pass on the other side of the rolls.

PETER HORBACH. KARL SIMONEIT.

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