US3774436A

US3774436A - Device for metal treatment

Info

Publication number: US3774436A
Application number: US00237153A
Authority: US
Inventors: E Tviksta
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-03-22
Filing date: 1972-03-22
Publication date: 1973-11-27
Anticipated expiration: 1990-11-27

Abstract

A device for removal of surface metal during passage of lengths of metal at elevated temperature through a shaving tool which engages the metal all around with means for cooling the metal as it issues from the shaving tool comprising a slotted tube mounted for movement into and out of the path of the metal with means for introducing a cooling fluid into the interior of the tube.

Description

United States Patent [191 Tviksta Nov. 27, 1973 DEVICE FOR METAL TREATMENT [75] Inventor: Evald Tviksta, l-lofors, Sweden [73] Assignee: La Salle Steel Company, Hammond,

Ind.

[22] Filed: Mar. 22, 1972 [21] Appl. No.: 237,153

[52] US. Cl. 72/342, 72/286 [51] Int. Cl. B21c 3/14 [58] Field of Search 72/39, 40, 286, 342

[56] References Cited UNITED STATES PATENTS 1,835,462 12/1931 Busey 72/39 3,131,814 5/1964 Prott 72/286 3,093,897 6/1963 Lemyre et al... 72/39 1,008,808 11/1911 Farkas 72/286 2,336,771 12/1943 Beaman 72/286 8/1941 Fisher 72/286 2,252,365 6/1938 Schuster 72/286 Primary Examiner-Charles W. Lanham Assistant Examiner-M. J. Keenan Atz0rneyMcDougall, Hersh & Scott [5 7 ABSTRACT A device for removal of surface metal during passage of lengths of metal at elevated temperature through a shaving tool which engages the metal all around with means for cooling the metal as it issues from the shaving tool comprising a slotted tube mounted for movement into and out of the path of the metal with means for introducing a cooling fluid into the interior of the tube.

5 Claims, 1 Drawing Figure DEVICE FOR METAL TREATMENT This invention relates to the removal of surface metal from lengths of material of uniform cross-section advanced through a processing die, such as a shaving tool which engages the metal all around to effect removal of a surface layer and it relates more particularly to the means and method for the treatment of metal wire to effect removal of surface metal during passage from an unwind drum to a windup drum.

The first purpose of the treatment is removal of surface layers of metal in which fine cracks could have been introduced during rolling or drawing of the wire, tube, rod or other lengths of metal of uniform crosssection. The cutting depth or layer of metal removed will vary usually within the range of 0.01 to 0.25 mm and generally about 0.15 mm, when measured in the radial direction or direction perpendicular to the surface.

The invention will be described with reference to the broaching or shaving of wire to effect removal of surface metal but it will be understood that the inventive concept will have application also to the removal of surface metal from rods, tubes and other lengths of metal or uniform cross-section and to the treatment of the inner and/or outer surfaces of such tubular members.

In order to avoid further defects of the wire, when it is further processed through the machine, and by rubbing when being wound up on the collecting or windup drum, the wire should be cooled. The cooling should take place immediately after the wire has passed the shaving tool but, because of the limited accessibility at the exit side of the shaving tool, in hitherto known devices, it has been difiicult at the beginning of the operation to fasten the leading end of the wire, which is fed through the tool, to the pliers on the rewind drum.

Thus it is an object of this invention to provide a means and method for cooling the metal immediately after issuance from the shaving tool or other die means employed for metal treatment.

These and other objects and advantages of this invention will hereinafter appear and for purposes of illustration, but not of limitation, an embodiment of the invention is shown in the Drawing which is a schematic diagram of an arrangement of apparatus embracing the features of this invention.

In accordance with the practice of this invention, the cooling device comprises a slotted tube provided with an inlet and an outlet for cooling means. The tube is mounted for movement transversely to the path of the wire through the machine and can be moved from a position out of this path to a working position in which it surrounds the wire after the end of the wire has been fed through the tool and clamped to the rewind drum.

With reference now to the drawing, the coil from which the wire 4 is drawn is identified by the numeral 1. The wire is fed first through a rectifying means 2 and thereafter through a high frequency heater or furnace 3.

The scaling or shaving tool 5 is mounted in the side wall of a box 6 in which the wall faces the furnace and in which the box comprises the first face of a cooling device for the wire. For this purpose, cooling liquid is fed into the hollow interior of the box through a feed pipe 7a. The wall of the box opposite to the tool is provided with an opening dimensioned to be sufficiently large to enable easy access to the wire in the box for connection to the pliers of the drawing means 10 which consists of a second drum on which the wire is rewound after. having been treated.

Closely adjacent to the opening 15, a second cooling face is provided. This is in the form of a slotted tube 8 which is supplied with cooling fluid through a feed pipe 7b at its mid-portion. The tube 8 is horizontally disposed in its working position so that fluid will flow axially through the tube for escape at both ends.

In order to be able to reach the wire end within the cooling box, it is important for the second cooling face to be moved aside during the setting up to feed the end of the wire to the gripping means. For this purpose. the tube 8 is mounted on a support 16 which in turn is mounted for radial movement by an amount to displace the tube out of thepath of the wire so as to free the opening 15. The tube 8 is also formed with a longitudinal slot so that the wire can be inserted in it.

Cooling fluid is also sprayed from a distributor over the periphery of the drum 10 during the rewinding operation. The distributor is fed from a pipe 70. A collecting trough 11 is provided beneath the drum 10. The fluid is fed from the trough through a pipe 18 to a heat exchanger 17 and then from the heat exchanger it is recycled to the supply pipes 7a, 7b and 7c.

The fluid from the first and second cooling faces is drained onto a baffle plate 13 over which it flows downwardly to the collecting vessel 11. By reason of the fact that the cooling fluid is recirculated in this manner, a

fluid can be selected to achieve a desired temperature and degree of lubrication. To prevent the scaled-off material or shavings, which can be very voluminous, from affecting the process, a protective tube 14 is mounted in advance of the shaving tool and is shaped in a manner such that the chips are forced to pass outwardly of the tube while the wire passes internally therethrough.

It will be apparent that the described cooling concept can be utilized for cooling wire or other lengths of uniform cross-section which are passed continuously through a processing die, such as a draw die, extrusion die and the like, in which a cooling effect is desired to be applied to the metal immediatelyupon issuance from the processing die.

It will be understood that changes may be made in the details of construction, arrangement and operation without departing from the spirit of the invention, especially as defined in the following claims.

I claim:

l. A device for the metallurgical treatment of lengths of metal or uniform cross-section advanced continuously through a tool at elevated temperature with means for cooling the metal upon issuance from the tool, comprising an elongate slotted tube having a passage extending continuously therethrough from an inlet at one end to an outlet at the other, means mounting the tube for movement transversely into and out of endwise alignment with the tool to provide access to the leading end of the metal as it issues from the tool when outside the path and to enable the metal to pass through the tube when in endwise alignment with the tool, and means for introducing a cooling fluid into the tube for cooling the metal as it passes therethrough.

2. A device as claimed in claim 1 in which the tool is a die through which the metal is advanced.

passage of the metal therethrough from the tool, and means for introducing a cooling fluid into the interior of the box.

5. A device as claimed in claim 4 in which the tube is located adjacent the back wall of the box to restrict the opening when in alignment position.

Claims

1. A device for the metallurgical treatment of lengths of metal or uniform cross-section advanced continuously through a tool at elevated temperature with means for cooling the metal upon issuance from the tool, comprising an elongate slotted tube having a passage extending continuously therethrough from an inlet at one end to an outlet at the other, means mounting the tube for movement transversely into and out of endwise alignment with the tool to provide access to the leading end of the metal as it issues from the tool when outside the path and to enable the metal to pass through the tube when in endwise alignment with the tool, and means for introducing a cooling fluid into the tube for cooling the metal as it passes therethrough.

3. A device as claimed in claim 1 in which the tool is a shaving tool which engages the metal all around for removal of surface metal as it passes through the tool.

4. A device as claimed in claim 1 which includes a cooling box having a front wall and a back wall, tool receiving opeNing in the front wall in which the tool is mounted and an opening of large dimension in the back wall in alignment with the opening in the front wall for passage of the metal therethrough from the tool, and means for introducing a cooling fluid into the interior of the box.