CNC Machining and CNC Machine Tools

Do you really understand the machine tools that you work with every day?

Orging machine is an independent body and the electrical power system, the domestic production of stamping die has a number of professional factory, stamping die has been used as standard parts production and sales. But large stamping die is usually special orders, and die together by the mold factory to provide complete sets of users. The rotation of the crankshaft, cam controller sends a corresponding signal electronic control system, after receiving the signal to send command to each working mechanism. What are the forging machine? The following specific to understanding the classification process and forging machine forging machine tool production.

Classification of forging machine tools

1、Roll forging machine

The metal produced by forging method of plastic deformation of workpiece in the formation of two counter rotating fan die. It is rolling forming (rolling) is a kind of special form. The roll forging can be used in the production of connecting rod, twist drill and spanner, spike, hoe, pick and roll forging turbine blade. The rolling process the deformation principle gradually, compared with ordinary die forging equipment, has simple structure, stable production, low vibration and noise, easy to realize automation and high production efficiency. For roll forging blanking roll forging and forming roll forging two. Blocking rollforging is ready for forging the required shape and size of the blank; forming can be directly made with shape and size requirements of forging roll forging.

2、Mechanical press type forging machine tool

Mechanical pressure forging machine through the slider crank mechanism to convert the rotating motion of the motor into reciprocating motion of the slider, for forging machinery forming on the blank. The mechanical pressure motor smooth, reliable, widely used in stamping, extrusion, forging and powder metallurgy process. The mechanical press accounted for more than half in the number of forging the total number of machinery. The specifications of mechanical press with nominal working force (KN) said that it is based on the slider moves to the next stop point of the trip is about 10 ~ 15 mm (or from BDC is crank angle is about 15 degrees to 30 degrees when the maximum point calculation) design work force.

3、Extrusion type forging machine tools

Hot extrusion forging machine widely used in the production of aluminum, copper and other non-ferrous metal pipe and profile, belongs to the metallurgical industry. Not only for the production of special steel pipe and profile hot extrusion, also for the production of cold extrusion or extrusion to temperature of solid and Kong Xin (through hole or holes) of carbon steel and alloy steel parts, such as a thick head of the rods and tubes, containers. Cold extrusion forging machine originally used in production of lead, zinc, tin, aluminum and copper pipes, profiles, and toothpaste hose (outside package of tin lead), battery shell (zinc), shell (copper) etc. cold extrusion parts. Simple operation, small parts and suitable for mass production.

4、Screw type forging machine tools

Screw type forging machine with screw and nut as a transmission mechanism, and by a screw drive will reverse rotary forging machinery flywheel turn into the slider up and down reciprocating screw press. Usually by the motor through the friction disc drives the flywheel rim and the flywheel to rotate, so the press also called friction press, China maximum friction press 25 megabytes of cattle. Then the electric screw press with the motor directly drives the flywheel, its compact structure, less transmission links, due to frequent commutation, to control the electrical requirements are higher, and need special motor.

Two, the main process of forging machine tool production

Working principle of forging machine

Mechanical pressure machine work, by the motor through the belt drive pulley (usually concurrently flywheel), through gear and clutch driven slider crank mechanism, the slider and the punch line downward. After the completion of the work of forging slider upward, the clutch disengages, while the crank shaft automatic device connected to the slider to stop at TDC. Mechanical press work, by the motor through the belt drive pulley (usually concurrently flywheel), through gear and clutch driven slider crank mechanism, the slider and the punch straight line down. After the completion of the work of forging slider upward, the clutch disengages, the crank shaft automatic device connected so, the slider to stop dead in the vicinity.

The essence of roll forging deformation of the billet rolling and stretching billet section is reduced and the length increases. When the cross section deformation is large, needs to be done by a few pass after repeated rolling. The process design is the rational decision of each step of roll forging reduction, broadening and extension deformation are determined. At the roll size, pass the blank shape and size, temperature and cooling lubrication and deformation conditions. Some double supporting roll forging machine for roll out in the end, this is a composite roll forging machine and double cantilever support type combination, it can realize vertical roll forging and the cantilever end complete horizontal expansion in large quantities. Forming roll forging production, widely used in mechanical hand transfer workpiece, automation of the production process to improve productivity, reduce labor intensity.

With a punch of blank placed in the concave die is pressurized to produce plastic flow, forging method to obtain hole or bump die shape corresponding to the mold parts. Extrusion, blank to produce three to stress, even plastic blank low, can be extrusion. Extrusion, especially cold extrusion, high material utilization rate, microstructure and Mechanical properties were improved, simple operation, high productivity, making the long rod, deep hole and thin wall and special-shaped parts, is less or no cutting process. The extrusion is mainly used for metal, plastic, rubber, also can be used for graphite and clay blank non metal forming.

Each slider crank mechanism is called a “point”. The most simple mechanical press with single point type, that is only a slider crank mechanism. Some large surface mechanical press, the slide bottom stress is uniform and smooth motion and using two or four points.

Mechanical press load impact resistance, which is forging a working cycle in the work of a very short time. Short term maximum power than the average power ten times above, so the transmission system is provided with a flywheel. The starting motor according to the average power selection, shipped to the rated speed of the flywheel, the convex energy savings. Die contact billet forging after work began, the drive motor power less than the load, lower speed flywheel releases savings energy compensation. Forging work is completed, the flywheel energy savings to accelerate again, to prepare for the next use.

Mechanical or electrical chain is arranged between the clutch and brake of mechanical press, to ensure the clutch brake must release the brake before the clutch disengages. A mechanical press for continuous operation, a single trip and inching (micro), most is realized through the control of the clutch and brake. The slider stroke length constant however, between the bottom surface and the working surface distance (called seal height), can be adjusted by a screw rod.

In the production, are likely to occur over press work force. In order to ensure the safety of equipment, often overload protection device in the press on. In order to ensure the safety of the operator, press it equipped with photoelectric or double hand operated personal protection device.

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