SU1276406A1 - Roll for edge-joint rolling - Google Patents

Abstract

The invention relates to the field of press-forging equipment, namely, rolls (B) intended for face rolling of workpieces. The aim of the invention is to improve the accuracy of products by eliminating the taper. The end face B is made with a recess: spherical, trapezoidal or tapered, which allows, in comparison with the known design B, to reduce the elastic bending B, and consequently, reduce the taper on the inner wall surface of the resulting products, i.e. increase their accuracy, reduce the cost of metal and the amount of subsequent machining. 3 hp f-ly. 3 il.

Description

to

Od

(| B

The invention relates to forging equipment, namely, a tool intended for face rolling of workpieces.

The aim of the invention is to increase the accuracy of the products obtained. Figure 1 shows the roll in the process of rolling the workpiece; figure 2 is the same, with a trapezoidal recess; fig.Z - the same, with a cone-shaped groove.

The roller for face rolling has a cone-shaped side surface 1, an end surface 2 on which a recess 3 is made symmetrically to the axis of the roll, and also a shank: 4, while the recess 3 can be made spherical, trapezoidal or cone-shaped 1L1M.

The workpiece 5 is placed in the matrix 6, where the ejector & 7 is also installed, a disk knife 8 is located near the matrix 6.

Tortsova rolling billet roll as follows. The matrix 6 with placed in it a group workpiece 5 give the rotational motion. The roller, whose axis makes an angle oi with the axis of the workpiece 5, moves towards the end of the workpiece. Having come into contact with the end of the workpiece, the roll will rotate due to the friction at the point of contact and, if it continues to move axially, deform the workpiece 5. The metal of the workpiece 5, forming a gap between the roller and the die, forms the wall 9 of the hollow rolled workpiece. After obtaining a wall 9 of increased height, the roll is retracted from the end of the workpiece 5 and the ejector 7 pushes the workpiece so that its entire rolled part protrudes beyond the end of the matrix. Then, by moving the disk knife 8 in the direction perpendicular to the axis of the workpiece, the rolled

part of the workpiece. After that, the disk knife 8 is returned to its original position, and the cycle of rolling the workpiece continues in the sequence described above. Rolling continues until the group blank 5 is consumed. In order to (do not damage the ejector 7 with a roller, it is necessary that

a press residue remained. To economically use metal, the height of the press residue should be less than the height of the rolled billet. The pressure switch is removed from the matrix 6 by the ejector 7, and a new group blank 5 is placed in the matrix 6.

Since the end working surface of the roll is concave rather than convex, as in the known roll,

when rolling, the elastic roll bending will be less than when rolling with a known roller, and therefore the taper will be less on the inner surface of the wall of the rolled blanks.

Claims (4)

1. Roller for face rolling with a conical side surface, characterized in that, in order to increase the accuracy of obtaining products by eliminating taper, a recess symmetric to the axis is made on the end surface of the roll roll. 2. Roller POP.1, characterized in that the recess on the end surface of the roll is made spherical. 3. Roll POP.1, characterized in that the recess on the end surface of the roll is made trapezoidal. 4. Roll POP.1, I differ by the fact that the recess on the end surface of the roll is tapered.