US3738557A - Transfer device on metal peeling machines - Google Patents

Abstract

A workpiece transfer device on metal peeling machines, having pairs of driven rolls adapted for rotating opposite to each other and for adjustable radial movement in relation to the workpiece by means of double acting pistons. The rolls are frame mounted and the latter are connected together by mechanical coupling elements.

Description

United States Patent Week June 12, 1973 [54] TRANSFER DEVICE ON METAL PEELING [56] References Cited MACHINES UNITED STATES PATENTS [75] Inventor: Karl Gustav Week, Solingen-Wald, 2,796,781 6/1957 Mills 1. 226/176 X Germany 3,263,284 8/1966 Orr et al. 226/176 X 3,647,127 3 1972 W" 226 177 [7 3] Assignee: Th. Kieserling & Albrecht Company, l I

solmgen Germany Primary ExaminerAllen N. Knowles {22] Filed: Nov. 15, 1971 Attorney-Edward E. Sachs 21 Appl. No; 198,893

[57] ABSTRACT A workpiece transfer device on metal peeling ma- [30] Forelgn Apphcatlon Pnomy Data chines, having pairs of driven rolls adapted for rotating NOV. 13, 1970 Germany P 20 55 888.7 pp to each other and for adjustable radial move ment in relation to the workpiece by means of double [52] US. Cl. 226/177 acting pistmm The rolls are frame mounted and the [51] Int. Cl B65h 17/22 are connected together b h ical coupling ele- [58] Field of Search 226/176, 177, 181, ments 4 Claims, 4 Drawing Figures 4 Shuts-Shut 1 F/Ci/ INVENTOR mam. eusmv wEcn arr/44 4:

ATTO'RNE Y Patented June 12, 1973 4 Shoots-Shoot 2 .INVENTOR KARL GUSTAV wco ATTORNEY Patented June 12, 1973 3,738,557

4. Shoots-Shoat 5 21 22 li I55 Q GT Q Q C) 1 CD INVENTOR KARL GUSTAV WECK all/40;

ATTORNEY Patented June 12, 1973 4 Shuts-Shut 4 IM/BVTOR KARL GUSTAV WECK ATTORNEY TRANSFER DEVICE ON METAL FEELING MACHINES The invention relates generally to metal peeling machines and, more particularly, to a transfer device thereon, for feeding and removing elongated material, or sections thereof, such as bars or pipes.

In peeling machines it is necessary that the workpieces are clamped centrally in relation to the blade circle and moved forward. Attempts have been made to accomplish this in many ways. In one known device, the driven rolls are mounted in double levers, the free ends of which are connected by links to a compression rod acted upon by a compression spring for the purpose of applying the necessary clamping force. The compression rod is movable in a sleeve, having at its outer end a threaded section on which an adjusting screw is seated. One end of the compression spring rests against this adjusting screw, while the other end bears against the compression-rod guide sleeve. The spring may be pre-loaded by turning the adjusting screw appropriately. The outer end of the compression rod passes through a manual lever which serves as an abutment therefor. Moving the lever against the force of the spring opens the rolls, the roll holders being moved in opposite directions. This type of knee-action clamping device for drive rolls has the disadvantage that the force of the spring is not sufficient to accommodate large clamping forces. However, even when the compression rod is actuated by a double-acting piston, there is the disadvantage that the clamping force is applied through the coupling elements and that the roll carriers must rotate in an exact manner centrallyabout the drive shafts of the pinions which are fixed to the rolls.

Also known is an arrangement in which the driven roll of each pair of rolls may be moved towards and away from the workpiece, while rotating in opposite directions, by means of two double-acting pistons. Apart from the fact that each roll carrier must have its own cylinder-piston drive, the roll carriers in this case must also be arranged in such a manner that they may pivot about the central axis of the drive shafts of the pinions by means of which the rolls are driven. In order to achieve synchronization, the roll carriers are connected by means of links to a sliding block movable in a guide parallel with the workpiece. Due to structural complexities the approach is economically not feasible.

In order to overcome the disadvantages of the above described prior art devices, it is provided, according to the invention, that one of the carriers of each pair of rolls be connected directly to the piston rod, while the other carrier is connected by tie-rods to the cylinder of the piston, the cylinder and the carrier being hinged by means of links to a disc arranged to rotate in the bed of the machine.

The disc is connected to two studs arranged equidistant from the center of rotation of the disc, for accom modating the ends of the links. The advantage of this design and arrangement of the coupling elements is such that only one double-acting piston is needed to ensure exact counter-rotating motion of the rolls and car riers of each pair of rolls; moreover, the necessary clamping forces are not applied through the coupling elements.

In one preferred form of the invention, the tie-rods also act as guides for one of the holders.

It is therefore the primary object of the invention to provide an economic transfer device for a peeling machine which rotates in opposite directions, and may be moved radially towards or away from the workpiece by means of a single cylinder-piston drive, with no clamping forces being applied to the coupling elements.

For a better understanding of the present invention, together with other and further objects thereof, reference is bad to the following description taken in con nection with the accompanying drawings, and its scope will be pointed out in the appended claims.

In the drawings:

FIG. 1 shows a schematic side elevational view of a metal peeling machine having a transfer device according to the invention located in front and to the rear of a cutter head;

FIG. 2 is an enlarged side view partly in longitudinal section, of a transfer device;

FIG. 3 is a sectional view taken along line A-B of FIG. 2; and

FIG. 4 is a sectional view taken along line C-D of FIG. 3, illustrating the coupling elements.

Referring now to the drawings, there is shown in FIG. 1 part of a peeling machine 40 provided with pairs of transfer rolls 2, 3 in front and to the rear of a rotating peeling head, not illustrated. These rolls 2, 3 are effective to transfer the required input and output forces to a typical workpiece 1 which is to be moved. The rolls are similar in construction and mode of operation, with the top roll 2 and bottom roll 3 being securely mounted on shafts 6 and 7 respectively, see FIGS. 2 to 4. The shafts 6 and 7 are driven, in a manner not shown, by cardan shafts 4, 5 respectively, with shaft 6 being rotatably mounted in an upper carrier 10 by means of roller bearings 8, 9, in a manner not permitting axial displacement. The shaft 7 is rotatably mounted in a bottom carrier 13 on roller bearings 11, 12 and is also not displaceable axially. The top carrier 10 is rigidly connected to a rod 14a of double-acting piston 14. The piston rod 14a and the opposite end thereof 14b are adapted to slide in cylinder heads 15a, 15b of cylinder 15. The axial end of top piston rod 14b is extended forming a threaded pin for carrying and adjusting nut to limit the stroke.

Attached to bottom cylinder head 15a are a pair of parallel spaced tie- rods 18, 19, the bottom ends of which are screwed onto carrier 13. The central portions of the tie-rods serve as guides for carrier 10, while the bottom ends thereof are provided with extensions 18a, 19a extending into bed 20 of the machine. Afiixed to the upper cylinder head 15b is a pin 21 (see FIG. 4) on the free end of which a link 22 is pivotably secured. The opposite end 22a of the link is rigidly attached to a stud 23 which in turn is mounted to rotate in discs 24a, 2412, see FIG. 3, eccentrically relative to the center of rotation 24. The discs 24a, 24b are rotatably mounted in frame 20 and are adapted to rotatably receive, equidistant from their common center of rotation 24, and at a location opposite to stud end 23, a stud 25 which is rigidly secured, to an end 26a of a second link 26. The lever end 26b of link 26 is rotatably mounted on the free end of a pin 27 attached to carrier 10.

The transfer device operates as follows.

A pressure medium, such as hydraulic fluid, is fed to the lower chamber of cylinder 15 through a conduit 28, see FIG. 2, the pressure medium causing piston 14 to move upwards and cylinder 15 to move downward. This causes carrier 10, which is directly connected to piston rod 14a, to also move upward and carrier 13, connected to cylinder 15 by tie- rods 18, 19, to move downward. Therefore, rolls 2 and 3 move apart from each other into an open position. The movement of the piston continues until the top surface thereof abuts cylinder head 15b. The stroke in this direction is therefore not adjustable. When rolls 2 and 3 have reached their open position, workpiece l is placed between them.

Moving a control valve in a manner known per se, and therefore not illustrated, causes the pressure medium to pass through conduit 29 to the upper cylinder chamber. This causes piston 14 to move downwards and cylinder 15 to move upwards. The two carriers and 13, and the rolls 2, 3 mounted therein, then move towards each other until they engage the workpiece 1. Since rolls 2 and 3 are driven and therefore rotate, the workpiece is moved forward in the direction of rotation of the rolls, as soon as the rolls have been biased sufficiently against the workpiece. Each stroke of piston 14 and cylinder 15 produces a corresponding positive movement of the coupling elements comprising links 22,26 discs 24a,24b, studs 23,25 and pins 21,27. This ensures completely uniform adjusting and opening movements of carriers l0, l3, and the workpiece is therefore accurately centered in relation to the cutter head of the peeling machine. The coupling elements thus transfer only minor frictional forces, the actual clamping forces being transferred directly, through piston rod 14a and tie- rods 18, 19 to carriers 10, 13 and to rolls 2, 3.

The movement of rolls 2, 3 towards each other may be limited by means of an adjusting nut 16.

While there have been described-what are at present considered to be the preferred embodiments of this invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention, and it is aimed, therefore, in the appended claims to cover all such changes and modifications as fall within the true spirit and scope of the invention.

What is claimed is:

1. In a metal peeling machine having a transfer device for passing workpieces through the peeling head, said transfer device comprising:

a pair of rolls, having an upper and a lower roll arranged for radial movement relative to the workpiece;

a first and a second carrier, each thereof supporting a roll;

a double acting piston having a piston rod connecting to the first carrier;

a cylinder housing said piston;

tie rod means connected at one end to the second carrier and at the opposite end to said cylinder;

rotatably disposed disc means;

and linking means articulatedly connecting said disc to said cylinder and to said first carrier.

2. In a peeling machine according to claim 1, wherein said linking means comprises two linking elements, one common end of each element being secured to said disc in spaced relation to each other and equidistant from the center of rotation of said disc.

3. In a peeling machine according to claim 1, wherein said tie rod means includes two spaced tie rods extending through said first carrier.

4. In a peeling machine accordingto claim 3, wherein said tie rods are effective to guide the movement of said first carrier.

Claims (4)

1. In a metal peeling machine having a transfer device for passing workpieces through the peeling head, said transfer device comprising: a pair of rolls, having an upper and a lower roll arranged for radial movement relative to the workpiece; a first and a second carrier, each thereof supporting a roll; a double acting piston having a piston rod connecting to the first carrier; a cylinder housing said piston; tie rod means connected at one end to the second carrier and at the opposite end to said cylinder; rotatably disposed disc means; and linking means articulatedly connecting said disc to said cylinder and to said first carrier.

2. In a peeling machine according to claim 1, wherein said linking means comprises two linking elements, one common end of each element being secured to said disc in spaced relation to each other and equidistant from the center of rotation of said disc.

3. In a peeling machine according to claim 1, wherein said tie rod means includes two spaced tie rods extending through said first carrier.

4. In a peeling machine according to claim 3, wherein said tie rods are effective to guide the movement of said first carrier.

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