Is there a difference between a flat forging machine and a hot heading machine

The characteristic of screw press is that the forging hammer has a large impact inertia, and the mechanical press has good guidance, a ejection device, and does not require 

steam power. It is a relatively universal forging equipment. It only produces a small amount of flash, with a very small die angle. After forging, the forging is pushed out by a 

top rod. The single die forging effect is very good for small and medium-sized forgings, especially for forging the head of valve, bolt and other rod parts. Forgings with co--

mplex shapes can be pre made into blanks on other equipment and then final forged on a screw press.

The working speed of the hydraulic forging press is low, the stroke is large, the pressure is high, and it can be adjusted with a ejection device; If necessary, pressure can be 

applied from several directions (multi-directional forging hydraulic press). The pressure of the giant hydraulic press reaches hundreds of thousands of kilonewtons, and the 

working platform area reaches tens of square meters. It is suitable for forging large steel, titanium alloy, aluminum alloy, and magnesium alloy forgings, especially for large 

aviation forgings, such as aircraft frames and landing gear beams. Multi directional forging hydraulic press is suitable for forging various complex forgings with multiple ca-

vities, such as high-pressure casings, valve bodies, and three-way and four-way pipe joints.

Flat forging machine, also known as flat forging, is a commonly used method for forging the head of long rods and fittings, as well as manufacturing annular parts with 

through holes using bar materials, such as manufacturing flange parts of long shafts, bearing rings, etc. Figure 3 [Forming process of flat forging machine die forgings] is 

a typical forming process of flat forging machine die forgings. During work, the movable concave die moves to clamp the heated rod material at the end, and then the 

multi station convex die fixed on the main slider is used for forging to fill the mold cavity with metal. If the length of the deformed part of the bar is greater than three 

times the diameter of the bar, the end of the bar must be accumulated one or several times before pre forging or final forging to avoid bending or folding of the bar 

during forging. When forging through holes, first forge the forging with blind holes, and then separate the forging from the bar material during punching. Flat forgings 

generally do not produce burrs or only produce smaller burrs, so the material utilization rate is high. However, it is necessary to clamp the bar material before forging, 

so a smaller diameter tolerance is required for the bar material.

The die forging process of electric heating applies pressure to the heating edge of the end of the bar material, causing it to deform during upsetting (Figure 5 [Electric 

Heating]). One end of the bar material is electrified, and the resistance of the bar material itself is used for contact heating. At the same time, axial pressure is applied to 

the end of the bar material, gradually heating and thickening one end until the mold cavity is filled and formed. This method combines heating and deformation on a 

single machine simultaneously, resulting in good forming and high efficiency. It is mainly used for the forming of internal combustion engine valves.

With the advancement of technology, in addition to the continuous improvement of traditional forging methods, many new precision and high-speed forging processes 

and equipment have also emerged. For example, when precision forging turbine blades using a hydraulic screw press, only a small amount of grinding allowance is left on 

the blade surface; Precision forging gears, the tooth shape can no longer be mechanically machined; The multi station automatic hot heading machine forms long or coiled 

bar materials, which are fed, heated, and cut into fixed length blanks, and then formed in 3-4 stations. The entire process is automatic and can forge about 3 kilograms of 

gear blanks and bearing ring blanks of 40-70 pieces per minute. High speed hammer forging is a die forging process performed using special equipment. Squeezing and 

cold heading, broadly speaking, also belong to die forging

Hot stamping generally refers to punching, cutting, and bending of thicker materials in addition to material processing; Hot heading extrusion refers to the extrusion type, 

such as tool wrenches, screw caps, nuts, etc.