SU1493359A1 - Method of producing rings from pipe blank - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used to produce flat and shaped rings such as washers, discs, etc. The purpose of the invention is to improve the quality and expansion of technological capabilities. The flanging are face rolling using a roll / B / 4, followed by plastic separation of the ring / K /. When flared with a conical B 4, it is moved from the center to the deformation center a distance equal to 1.5-8 wall thicknesses of the workpiece 1. When flared with a cylindrical B 4, it is moved so that its meridian plane moves along the rotation of the workpiece 1 for its meridian section at a distance equal to 1-5 wall thickness of the workpiece 1. Moving 4 into the inside of the workpiece 1 allows for flanging and get K with an outer diameter smaller than the diameter of the workpiece 1. Pipe workpiece 1 is set in the matrix 2 and supply This means that the flare is carried out when the die 2 is rotated with the workpiece 1 and B 4 moves along the axis of the workpiece 1. The presence of a sharp edge 3 on the die 2 or on the ring groove 5 B 4 results in the flange separation of K. 3 z. f-ly, 3 ill.

Description

The invention relates to the processing of metals by pressure and can be used to produce flat and shaped rings such as washers, discs, and the like.

The aim of the invention is to improve the quality and expansion of technological capabilities by producing flat and profiled rings.

Fig. 1 depicts the start of sampling the end of the billet; figure 2 - the end of the flanging tapered roller; on fig.Z - flanging a cylindrical roller.

A device for producing rings from tubular billet 1 includes a die 2 with a cutting edge 3, a deforming roller 4 with an annular groove 5, an ejector 6 and a mandrel 7.

The method is carried out as follows.

The tube blank 1 is placed in the cavity of the die 2 and a freely rotating roll 4 is supplied. In the case of forming a ring according to the flanging scheme of the pipe end outward, the tip of the tapered roll moves from the axis of the blank in the direction of the deformation zone.

When using a cylindrical roll 4, its meridian plane moves with respect to the meridional section of the workpiece in the direction opposite to its rotation. In the case of flanging the pipe end inward, the tops of the tapered roll 4 or the meridional plane of the cylindrical roll are made in the opposite direction. The flare is made by rotating the die 2 with the workpiece 1 and feeding the roll along the axis of the workpiece. The presence of a sharp edge 3 on the die 2 (Fig. 1) or on the mandrel 7 (Fig. 2) and an annular groove 5 on the roll cause the flange to separate the ring. After the final formation of the product, the roll is retracted, the matrix is stopped, the resulting product is removed by the ejector 6 or mandrel 7 and the pipe is fed to its original position.

The amount of roll offset required (/ depends on the coefficient of friction

and"

wall thickness t. When using a tapered roll, the required amount of movement is 1.5-8 times the thickness of the wall of the initial loading and when using a cylindrical

roll - 1-3 wall thickness of the original billet. With a known coefficient of friction, the displacement amount can be specified for the tapered roll by the ratio (1.5-2) p, and when using a cylindrical roll cf to (2.5-3) f /.

In this method, on a rolling machine MRB-35K, rings of MOb with the dimensions of the original blank are rolled out: a) dj, 60 mm; mm; to 5 mm; b) mm; bo 30 mm; mm and steel 10 with the dimensions of the original billet: dj, 60 mm; mm, mm The required amount of movement of the apex of the tapered roll relative to the axis of the workpiece was mm for copper and 10 sC for steel 15 mm.

The frequency of rotation of the workpiece n -120 rev / min on the rolling time 40-50 s. The maximum force for steel is 10–22 tf, for copper — 15 tf. As a result, flattening and separation were obtained flat rings with a thickness of 4 mm, an inner diameter of 70 mm and an outer diameter of 95 and 110 mm for blanks with mm and h, 30 mm, respectively.

On the machine tool MRB-35 with a cylindrical roller, blanks from alloy VT 1-O with the initial size of mm are rolled; mm; t (, 3 mm. The offset of the meridional plane of the cylindrical roll with respect to the meridional section of the workpiece in the direction opposite to its rotation was 5 mm. The frequency of rotation of the workpiece h 40 rpm. The time of rolling was 55 sec., force - 25 tf. As a result rings were obtained with a flat and wavy surface, with inner and outer diameters of 22 and 45 mm, respectively, and subsequent mechanical treatment is necessary only to remove the burr.

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five

Claims (4)

1. A method of producing rings from a tubular billet by flanging its end and separating an annular part from the bead, characterized in that, in order to improve the quality and broaden the technological capabilities by obtaining shaped rings, flanging is carried out by end rolling by means of a roll followed by plastic separation rings in the transition zone from the collar to the wall of the workpiece .. 2. Method POP1, characterized in that the face rolling is carried out by a tapered roller while moving its top from the axis of the workpiece towards the deformation zone by a distance equal to 1.5-8 wall thicknesses of the original billet. 3. Method POP.1, characterized in that the face rolling is carried out by a cylindrical roller while moving its meridian plane along the rotation of the workpiece for its meridian section over a distance equal to 1–5 wall thicknesses of the original workpiece. 4. The method according to claims 1 to 3, of which is made with the fact that, in order to obtain rings with an outer diameter not exceeding the diameter of the workpiece and to improve deformation conditions, flanging is carried out inwards. fig 2 / Z