SU1551462A1 - Blank for making forgings with flange and hub - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used to obtain forgings with a flange and a hub without punching slopes. The purpose of the invention is to increase the economy by reducing the cost of manufacturing forgings. The flange of the workpiece is rotated toward a smaller base by an angle γ varying in the range of 0.1α≤γ≤0.9α. The angle γ is determined by the expression: γ = 12.36-5.10D _n / D _at -1.68H _with / D _at -0.36α-54.33H _f / D _at + 0.38D _n ^. α / D _in + 31.33D _n ^. H _f / D _in ² , where α is the angle of inclination of the forming body of the workpiece to its longitudinal axis, degrees

D _n , D _in - respectively the outer and inner diameters of the forging hub

H _with - the height of the forging hub

H _f - the thickness of the flange. Workpiece processing is carried out by trimming flush, piercing a hole and dispensing. In the process of distributing the stamped workpiece during its processing due to the occurrence of a bending moment, the flange bends to a horizontal position. 2 Il.

Description

- The invention relates to the processing of metals by pressure and can be used to obtain forgings with a flange and a hub without punching gradients.

The aim of the invention is to improve the economy by reducing the costs of manufacturing forgings by reducing the effort and work of deforming the workpiece and simplifying the deforming tool.

FIG. 1 shows the workpiece, the cross-section, and the position of the deforming tool before dispensing; on

FIG. 2 - forging, cross section, and the position of the deforming tool after distribution.

The forming body of the workpiece under the hub (Fig. 1) is inclined to its vertical axis by an angle cЈ equal to the angle of the forging bias. The flange of the workpiece is rotated by an angle of 0.1otЈj - 0.9ei- towards the smaller base. The specific value of the angle in the specified range is assigned depending on the ratios of the dimensions of the forging and the angle about in accordance with the expression

f 12,36-5,10-Ј- - 1, - Oe36o6

De

+

0.38

five.

+ 31.33- (1) 5

(p

t

where DH, D6 are the outer and inner diameters of the forging hub, respectively; hc is the height of the forging;

Id, is the thickness of the flange;

cL - the angle of inclination

the walls of the hub of the workpiece, hail.

If the flange is rotated by an angle greater than 0.9oi, s, for example, an angle equal to 1.0 ° Ј, then when the workpiece is distributed further, the flange does not reach the horizontal position required by the drawing, which leads to an increase in allowances for machining and increased metal consumption.

If the flange is turned at an angle less than 0.1 ot, for example, the flange is made horizontal, then the flange is in the process of distributing the workpiece. goes into a horizontal position, which also leads to an increase in allowances for machining and increased consumption of metal.

Expression (1) was found experimentally on the basis of the method of mathematical planning of the experiment.

The stamped billet 1 is installed on the trimming matrix 2. The billet is moved by the punch 3, the cutting is done around the hole, the hole is pierced and the hub of the billet is distributed under the influence of the force P, the supporting surface of the punch 3 is inclined to the horizontal plane under angle 0 9 equal to the angle X1 of rotation of the flange of the workpiece.

In the process of distribution, due to the occurrence of a bending moment from the forces P and Q from the side of the distributing punch 4, the flange bends and moves away from the supporting platform of the punch 3. By the time the distribution ends, the flange assumes a horizontal position. Forging 5, obtained from the proposed billet, has a high geometrical accuracy and small machining allowances for

the flange and the inner surface of the i

No additional force is required to edit the flange.

o

five

Example: A forging with a hub and a flange in accordance with the drawing has the dimensions: hc height hc 35 mm, flange thickness h ™ 9 mm, outer diameter of the hub DH 140 mm, internal diameter of the hub D & 115 mm, outer diameter of the flange 174 mm. Forging material steel 5PS.

For the manufacture of forgings, a blank is used with an angle of inclination of the walls equal to the angle of the stamping gradient of 7 °. The flange of the workpiece is rotated by the angle Y, defined by expression (1):

| f 5,1 ft. 5 (hail).

0

thirty

,, -

35 0

55

45

50

The billet was obtained by hot forging on KGI1P with a force of 25 MN.

After trimming around the hole, piercing the hole and dispensing on a crank press with a force of 2.5 MN, a forging of the dimensions required by the drawing with a horizontal flange was obtained. The non-flatness of the flange after the distribution of the party forgings in the amount of 500 pieces. does not exceed 0.3 mm. Excessive allowances on the flange and in the hole of the hub are missing.

The blank can be used to make forgings with a flange width not exceeding four of its thickness.

Claims (1)

Invention Formula A blank for the manufacture of forgings with a flange and a hub, comprising a housing under the hub in the form of a hollow truncated cone with a flange on the side of its larger base, placed at an angle to the plane perpendicular to the longitudinal axis of the hull, and rotated towards its smaller base; that in order to increase efficiency by reducing the cost of manufacturing the forging, the angle θ of the flange angle to the plane perpendicular to the body axis is determined from the dependence O, 1 oi, s u b 0.9 °; DH  12.36-5.10- - 1 ЗП Сл nf I --- - 0, Zbob i + O + 31 33-I - 2 U J "D6J1 JJ D26 the angle of inclination of the forming body and the workpiece to its longitudinal axis, degrees; and Djj-, respectively, external and internal diameters of the hub forgings; hc is the height of the forging hub, hqj is the thickness of the flange. FIG. i .