China Die Mould Steel Forged Forging Part Roller Shaft Roller

Brief instroduction of forged forging parts/roller shaft/shaft roller
Forging refers to the workpiece or blank obtained by forging and deforming the metal blank.
The mechanical properties of metal billet can be changed by applying pressure to shape and deform it.
Forging can be divided into cold forging and hot forging according to the temperature of billet during processing.
Cold forging is generally processed at room temperature, while hot forging is processed at a higher recrystallization temperature than the metal blank.
Type
The complex degree of geometry structure of forgings determines that there is an obvious difference between die forging process and die design.
General forgings in the industry are divided into 3 categories, each category is further subdivided into 3 groups, a total of 9 groups.
The 1 class - the principal axis made in the die chamber, a horizontal 2 d similar size (round/the majority of rotors, square or approximate shape) of forgings.
The upsetting step is usually used in die forging of this type of forging.
It was divided into 3 groups according to the difficulty of forming.
Groups: 1 - 1 in upsetting and slightly pushed way shape of forgings, such as highly little change gear between wheel and rim.
1 - 2 groups: in order to squeeze and slightly upsetting method and combined extrusion, press in and the way of upsetting forging forming, such as, cross the cardan shaft.
1 - 3 groups: in compound extrusion forming of forgings, such as wheel shaft, etc.
The 2 class - the principal axis lie in the chamber die forming, horizontal one dimensional size long straight long axial forgings.
According to the difference degree of the fault area of the vertical spindle line, it was subdivided into 3 groups.
2 - 1 set of vertical axis line of area difference, the biggest area and the ratio of the minimum sectional area < 1.6, but no other forging equipment has been using).
2 - a greater difference between two groups of vertical spindle line broken area (the largest area and the ratio of the minimum sectional area is > 1.6, need other equipment blocking) ahead of forgings, such as connecting rod, etc.
2 - 3 groups end (end or ends) as the fork/branches of forgings, except in accordance with the above two groups need to determine whether blocking, step must forge the reasonable design, such as casing fork, etc.
First 1, 2 forgings are generally flat die or symmetric curved die, asymmetric surface increased the complexity of the forging die.
The 3 class - the main axis of twists and turns, lie in the chamber die forging forming.
It is divided into 3 groups according to the direction of the main axis.
3 - 1 set of main axis in the vertical plane bending (parting surface for rolling flat surface or with head), but the floor plan for the long axis of the straight shape (similar to the first 2 class), generally do not need to design special bending step can shape of forgings.
3 - 2 set of bending in the plane of the principal axis (parting surface is commonly plane), must be arranged to the forming of bending forgings.
3 1- three groups of principal axis bending die (asymmetric surface) for the space of forgings.
There are also forgings with a combination of two or three types of structural features with a higher degree of complexity, such as most automotive knuckles forgings.
Application
1. General industrial forgings refer to civil industries such as machine tool manufacturing, agricultural machinery, agricultural tool manufacturing and bearing industry.
2. Forgings for hydrogenerator, such as spindle and intermediate shaft, etc
.
3. Forgings for thermal power station, such as rotor, impeller, ring spindle, etc.
4. metallurgical machinery, such as cold roll, hot roll and herringbone gear shaft.
5. Forgings for pressure vessels, such as cylinder, cauldron flange and sealing head.
6. Marine forgings, such as crankshaft, stern shaft, rudder, thrust shaft and intermediate shaft, etc.
7. Forging mechanical equipment, such as hammer head, hammer rod, hydraulic press of the column, cylinder, shaft of the cylinder and cylinder, etc.
8. Module forging, mainly forging die for hot die forging hammer.
9. Forgings used in automobile industry, such as left and right knuckles, front beams, couplings, etc. According to statistics, forgings account for 80% of the mass of automobiles.
10. Locomotive forgings, such as axle, wheel, plate spring, locomotive crankshaft, etc., according to statistics, forging in the locomotive accounted for 60% of its mass.
11. Forgings for military use, such as gun barrel, door body, bolt bracket and traction ring, etc. According to statistics, forgings account for 65% of the mass of tanks.
Characteristic
1) large weight range.
Forgings range in size from a few grams to several hundred tons
2) higher quality than casting.
Forgings have better mechanical properties than castings, and can withstand large impact and other heavy loads.
Forgings are of better quality than rolled steels for high carbide steels.
Such as high - speed steel rolling only after the transformation of forging to meet the use of requirements.
In particular, high - speed steel mills must be reformed.
3) the lightest weight.
On the premise of ensuring the design strength, the forging is lighter than the casting, which reduces the weight of the machine itself, which is of great significance for vehicles, aircraft, vehicles and aerospace flight equipment.
4) save raw materials.
For example, when the crankshaft with a static weight of 17kg is used in the automobile, the chip should account for 189% of the crankshaft weight when it is forged by rolling material, while the chip only accounts for 30% when it is forged by die forging, and the machining time is shortened by 1/6.
Precision forging forgings, not only can save more raw materials, but also can save more machining time.
5) high productivity.
For example, the use of two hot die forging press die forging radial thrust bearings, can replace 30 automatic cutting machine tools.
When the M24 nut is produced by the top forging automaton, the productivity of the six-axis automatic lathe is 17.5 times.
6) free forging flexibility, therefore, some repair factories widely use the forging method to produce a variety of accessories.