2. Forging is volume forming.

3、

Superplastic die forging forming

1) open die forging

Compared with common open die forging, the die structure is basically the same, but

It is necessary to add heating and insulation devices integrated with the mold.

(2) Closed die forging

Closed die forging has no flash groove on the die structure.

Structural characteristics of forging die;

Die forging press deforms metal through static pressure.

Shape, low working speed, stable working, die forging

There is a gap between the upper and lower die surfaces, so there is no collision.

In order to usually adopt combined structure die on forging press.

With. It is mainly composed of mold base, pad, cavity insert and insert.

Block fastener, guide post, guide sleeve, ejection mechanism, etc.

Component.

1, forging die structure type

According to the different fastening methods of the insert in the die frame

There are two main types of forging die structures on forging press: pressing type.

Plate fastening type and wedge fastening type. Clamping plate fastening knot

Usually used to fasten multi-cavity circular inserts, wedges

The fastening structure is mainly used for fastening rectangular inserts with a single cavity.

Solid.

Characteristics of die forging process

(1), the deformation of the blank in the cavity is generally in

Completed under repeated blows;

(2) Due to the ejection device, some forgings can

Reduce the die forging inclination to1;

(3), due to the ejection device, for some long axis class.

Forgings can be forged vertically;

(4) Because of the ejection device, it is different from heat.

Die forging press is sensitive to overload, so it is in a friction state.

Friction press is suitable for precision die forging;

(5) Due to the low hitting speed, a mold can be used.

Combined structure;

(6) Due to the slow traveling speed, the metal is in the cavity.

Long residence time, fast cooling, more difficult than forging on hammer.

Fill the hole. Under normal circumstances, die forging shall not exceed three times.

Strike;

(7), friction press generally should not bear eccentric load.

Load, so it is often used in single-cavity final forging. Ruocai

For forgings with double cavities, the distance between the centers of the cavities should not exceed the wire.

Radius of pitch circle of steel bar;

(8) Due to the number of strokes per minute of the friction press.

A few, for those who need stretching, rolling, bending and pre-forging.

Generally, other equipment is needed to manufacture the blank of forgings.

(9) It is difficult to remove the oxide scale due to repeated heating of forgings.

Cleaning, poor surface quality of forgings.