US3575029A

US3575029A - Device for draw-forming metal rods

Info

Publication number: US3575029A
Application number: US783998A
Authority: US
Inventors: Hans Weber; Joachim Mietzner
Original assignee: Demag AG
Current assignee: Mannesmann Demag AG
Priority date: 1967-12-29
Filing date: 1968-12-16
Publication date: 1971-04-13
Anticipated expiration: 1988-04-13
Also published as: AT312543B; GB1215350A; JPS4916347B1; BE714483A; FR96446E; CH511072A

Abstract

A device for drawing a metal rod, particularly, a cast steel rod comprises one or more deforming rollers which are arranged to engage the rod on opposite sides thereof as it is moved thereby. The rollers are moved by a mechanism to provide for the desired drawing down from a wide diameter down to a relatively small diameter. The mechanism includes a pivotal support member which carries a deforming roll and which is moved by a first rotating crank into pressure force engagement with the rod being cast as the rod is moved thereby. The mechanism also includes an additional second crank mechanism for engagement with the support for shifting the support in a substantially longitudinal direction in respect to the rod being formed. In a first embodiment the second crank for controlling the longitudinal direction of movement of the support engages the support by means of a pushrod having a pin which is guided in a slot defined in the direction of the longitudinal axis of the support member and which is also guided by a sliding block. In another embodiment the engagement of the second crank with the support is a direct engagement. The drive for the crank includes a gear which drives through an idler gear to the crank for moving the support member in a direction toward and away from the rod being cast. An alternate embodiment includes a direct gear drive from the first crank to a gear carrying the shaft for the second crank.

Description

United States Patent [72] lnve ntors Hans Weber Duisburg; Joachim Mietzner, Angermund, Germany [21 Appl. No. 783,998 [22] Filed Dec. 16, 1968 [45] Patented Apr. 13, 1971 [73] Assignee Demag Aktiengesellschatt Duisburg, Gennany [32] Priority Dec. 29, 1967 i 3 Germany [31] P 16 02 062.5

[54] DEVICE FOR DRAW-FORMING METAL RODS 7 Claims, 3 Drawing Figs.

[52] US. Cl 72/240, 72/406, 72/408 [51] Int. Cl B21b 1/42 [50] Field of Search 72/184, 189,190, 191,240, 406, 408

[56] References Cited,

UNITED STATES PATENTS 995,427 6/1911 lnshaw et al. 72/240 Primary Examiner-Lowell A. Larson Attorney-McGlew and Toren ABSTRACT: A device for drawing a metal rod, particularly, a cast steel rod comprises one or more deforming rollers which are arranged to engage the rod on opposite sides thereof as it is moved thereby. The rollers are moved by a mechanism to provide for the desired drawing down from a wide diameter down to a relatively small diameter. The mechanism includes a pivotal support member which carries a deforming roll and which is moved by a first rotating crank into pressure force engagement with the rod being cast as the rod is moved thereby. The mechanism also includes an additional second crank mechanism for engagement with the support for shifting the support in a substantially longitudinal direction in respect to the rod being formed. In a first embodiment the second crank for controlling the longitudinal direction of movement of the support engages the support by means of a pushrod having a. pin which is guided in a slot defined in the direction of the longitudinal axis of the support member and which is also guided by a sliding block. In another embodiment the engagement of the second crank with the support is a direct engagement. The drive for the crank includes a gear which drives through an idler gear to the crank for moving the support member in a direction toward and away from the rod being cast. An alternate embodiment includes a direct gear drive from the first crank to a gear carrying the shaft for the second crank.

Patented; April 13, 1971 v 3,575,029

3 Sheets-Sheet 1 Inventors HANS WEBER J'JACH/M M/El'Zl/EZ ATTOQA/EY;

Patented April13, 1971 3,575,029

3 Sheets-Sheet 2 Inventors HANS WEBER JOACH/M M/EfZ/VEQ A TTOBNEVS Patentd A ril13, 1971 3,575,029

3 Sheets-Sheet 13 Inventors mws wsasz JDAC/l/M m/srzz/za A TTOQNEYS supporting member through a construction also permits a very compact machine DEVICE FOR DRAW-FORMING METAL RODS SUMMARY OF THE lNVENTlON This invention relates in general to metal forming devices and in particular, to a new and useful device for drawing down a metal rod, particularly, a cast steel rod, which includes separate rotatable drive cranks connected to an oscillating support member carrying a deforming roller to control the movement of the member to guide the deforming roller into forming engagement with the rod as it is moved thereby.

An important requirement for the forming of a metal rod to draw it down to a relatively small diameter requires that there be a high reduction of the cross section of the rod with each pass. It is particularly desirable to achieve a great reduction of the cross section when drawing hot rods such as they would be obtained from a continuous casting plant without any additional heating. A mechanism for controlling the positioning of deformation rollers which operate on the rod is provided in accordance with the invention and it is an improvement over the prior art particularly in respect to the fact that it permits the manufacture of the rods of different dimensions when operating upon a workpiece having an optimum casting cross section. The changing of a rod cross section can be effected during the operation by forming only a small length of the rod during each pass to provide the desired transition. The resulting deformation forces are very great, however, in view of the bloom cross section which must be processed so that the forming forces are comparable to those of a conventional rolling stand.

in order to avoid premature wear of the device but to ensure a good absorption of the forces it is suggested that the forming rollers be carried on a support member. This support member is mounted so that it may be oscillated backwardly and forwardly and it is guided by two separate rotating crank elements which are either directly connected thereto or connected to the support member through a pushrod and an associated pin and slot connection. The two separate crank members operate to provide a separate drive for the deformation roller in respect to longitudinal and radial movement directions and may provide for example, separate drives for affecting the deformation of the rod and for absorbing the deformation forces. A particularly favorable embodiment is obtained by arranging a lower crank rod which is articulated by a shaft mounted on one side of the apparatus to oscillate a pushrod member which is confined for movement on a sliding block located above the rod being deformed. The pushrod is in turn connected through a pin into a slot of the support member carrying the deformation roller. The sliding block guide ensures an exact application of the deformation roll on the workpiece and permits an exact forming of the rod down to its reduced dimension at the location of the deformation zone.

According to another feature of the invention the oscillating support member and the crank member for transmitting the pressure force to the deformation roller carried by the support member are combined in a single part. This permits the construction of a very compact machine requiring very little space and this is particularly important where a plurality of rods are to be operated in several drawing down operational feedlines which are arranged close together.

Another simplification of a construction is an arrangement in which the pivotal support member is driven by a crank having a pin which is guided in a straight recess or slot of the supporting member. With such a construction the oscillatable movement of the roll support is carried out by the pin and guide arrangement but the pressure forces are applied to the separate drive. This construction. It is advantageous to make the drive for both movements of the support member synchronous.

The oscillating drive and the pressure force supplying drive to the deformation rollers carried by the support member better advantageously is carried out through a plurality of meshing gears with the crank drives being carried on a shaft carrying an associated one of the gears. Synchronization of one crank rod movement with the other is carried out either through a direct gear driving or by the use of an intermediate gear or idler. The upper end of the support rod is advantageously carried by one of the crank members and is permitted to pivot so as to oscillate the roller carried at its opposite lower end. The other crank drive is connected to the support member at a location intermediate the length thereof and is moved to cause the oscillation of the support member.

Accordingly, it is an object of the invention to provide a device for drawing down a metal rod which includes one or more oscillatable supporting members which carries a deformation roller which is engageable with a rod workpiece as the rod is moved thereby in a pass, and which also includes a first crank connected to the support member for applying a deformation force against the rod and a second crank connected to the supporting member to affect the oscillation thereof.

A further object of the invention is to provide a device for deforming a metal rod particularly a cast rod which includes first and second crank members for controlling the movement of the support member carrying a deformation roller which is operable on the rod, the crank members being driven from a gear transmission to coordinate their movement and to affect the separate oscillatory drive of the support member for the deformation roller and its separate pressure drive movement.

A further object of the invention is to provide a device for forming a metal rod which is simple in design, rugged in construction, and economical to manufacture.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

HO. 1 is a schematic side elevational view of a device for drawing a cast rod constructed in accordance with the invention;

HO. 2 is a view similar to FIG. 1 of another embodiment of the invention; and

FIG. 3 is a view similar to FIG. embodiment of the invention.

GENERAL DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings in particular, the invention embodied therein in FIG. 1 comprises a rod drawing apparatus for operating on a casting rod 1 which is fed to the device of the invention at a rate of from 3 to 4 meters per minute. The rod during each pass is reduced at the location 3 from a cross section comparable to that indicated at 2 to a cross section at the end indicated at 4. For this purpose working rolls or deformation rollers 5 are mounted on a support or oscillatable member 6 which is pivotal on a pivot 7 formed at the end of first crank means in the form of a crank arm 40 which is carried on a shaft 42. The support 6 receives its oscillatable drive in accordance with the invention by second crank means in the form of a drive mechanism which includes a pushrod 8 which is pivoted at pivot 9 on a crank member 44 carried on a shaft 46. Connecting means are provided between the member 6 and the second crank means which, in addition to the pushrod 8, includes a pin 22 at the outer end of the pushrod which is confined for movement within a slot 25 and which extends along parallel to the longitudinal axis of the support 6. The .pin 22 also carries a block 21 which is confined 1 of still another for movement along an oblique path defined between two

sliding surfaces

23 and 24.

in accordance with a further feature of the invention the support 6 for the deformation roller is also driven in a pressure direction, that is, in a direction substantially radial to the rod or workpiece 4 by a crank member 40. Synchronism of the

cranks

40 and 44 is carried out by an interconnecting gearing between

shafts

42 and 46 which includes the drive gear on shaft 46, an idler gear 16 and a driven gear 11' on the shaft 42. The operation of the mechanism produces a movement of a deformation roller 5 such that its center passes through the curve 50 indicated in H0. 1. A similar deformation roller 5 is arranged on the opposite side or underside of the rod 4 and the device is operated so that the

deformation rollers

5,5 move to engage the rod uniformly from opposite sides. Similar sets of

deformation rollers

5,5 may be employed around the rod at distinct planes.

In the embodiment indicated in FIG. 2, a similar supporting member or oscillating member 6' is provided which is pivotally supported at 7' on a crank member 40' carried on the shaft 42'. In this embodiment a pin 22 is carried directly on a crank 44' which is affixed to shaft 46'. In addition, the gear 10 drives through an idler 16' to the gear 11' carried on the shaft 42'. Thus the construction does not require the pushrod 8 of FIG. 1 but a similar curve of movement 18 of the center of the deformation rollers 5 is produced.

ln the embodiment indicated in FIG. 3, a support or oscillating member 6" is pivotally supported on at a pivot 7 of a crank member 40" which is carried on a shaft 42". The oscillatable movement of the support member 6" is effected by a crank 44" carried on a shaft 46 which pivotally connects a pushrod 8" at a pivot pin 9". The pushrod 8" is pivoted to the support member 6" at the location of a pivot 54. In this construction a drive gear 10" on the shaft 46" drives the driven gear 11 on the shaft 42" directly. This embodiment provides a synchronous drive of the oscillating movement and the screwdown or pressure movement. The apparatus of FIG. 3 is particularly suitable for transmitting great forces with a suitable curve of operation 18'.

We claim:

I. A device for the drawing of a continuous metal casting rod particularly a steel casting comprising, a support member, a deformation roller carried at one end of said support member adapted to engage a workpiece rod for forming the rod, first crank means connected to said support member adjacent one end thereof for pivotally supporting said member for oscillation and for driving said member in a pressure force direction against said rod, second crank means connected to said support member intermediate its length for oscillating said support member, and connecting means between said second crank means and said support member defining an articulated joint shiftable in directions parallel to the axis of said support member during oscillation thereof.

2. A d vice, according to claim 1, including transmission means connected between first crank means and said second crank means for operating said first and second crank means in synchronism.

3. A device, according to claim 1, wherein said first crank means comprises a rotatable crank member connected to said support said second crank means comprising a rotatable crank member and a pushrod member pivoted to said crank member and connected to said support.

4, A device, according to claim 3, wherein said connecting means includes a pin on said pushrod member, said support having a slot defined therein extending along its longitudinal axis, said pin being confined for movement in said slot.

5. A device, according to claim 4, including a block connected to said pin, and means confining said block for movement along an oblique path alongside the workpiece being formed.

6. A device, according to claim 1, including means for synchronizing the speed of rotation of said first crank means to said second crank means comprising a. drivin gear connected to said second crank means and r0 table therewith, a driven gear connected to said second crank means and rotatable therewith, and an intermediate gear between said driving and driven gear for driving said driven gear in timed relation to said driving gear.

7. A device, according to claim 1, including means for synchronizing the speed of rotation of said first crank means to said second crank means comprising a driving gear connected to said second crank means and rotatable therewith, and a driven gear connected to said second crank means and rotatable therewith, said driving gear directly engaging said driven gear.

Claims

1. A device for the drawing of a continuous metal casting rod particularly a steel casting comprising, a support member, a deformation roller carried at one end of said support member adapted to engage a workpiece rod for forming the rod, first crank means connected to said support member adjacent one end thereof for pivotally supporting said member for oscillation and for driving said member in a pressure force direction against said rod, second crank means connected to said support member intermediate its length for oscillating said support member, and connecting means between said second crank means and said support member defining an articulated joint shiftable in directions parallel to the axis of said support member during oscillation thereof.

2. A device, according to claim 1, including transmission means connected between first crank means and said second crank means for operating said first and second crank means in synchronism.

4. A device, according to claim 3, wherein said connecting means includes a pin on said pushrod member, said support having a slot defined therein extending along its longitudinal axis, said pin being confined for movement in said slot.

6. A device, according to claim 1, including means for synchronizing the speed of rotation of said first crank means to said second crank means comprising a driving gear connected to said second crank means and rotatable therewith, a driven gear connected to said second crank means and rotatable therewith, and an intermediate gear between said driving and driven gear for driving said driven gear in timed relation to said driving gear.