Instantly released high-pressure gas (the pressure is generally 15000 MPa) forces the hammer to move downwards at a high speed of 9 ~ 24 m/s, and at the same time pushes the head of the high-pressure cylinder upwards, driving the whole frame to move upwards. The upper die on the hammer and the lower die on the frame collide with the workpiece in the air to make it plastically deformed. The mass of the frame is much greater than that of the hammer body, so the moving speed is slow, the stroke is small and the operation is convenient. After hammering, the return rod installed in the frame pushes the hammer back to its original position. The frame is placed on an externally supported mat. This kind of equipment can only be clicked once at first, and then a high-speed hammer with internal combustion can be developed. High-speed hammer forging has obvious deformation inertia force and deformation thermal effect. Proper control can improve the plasticity of metal and improve the flow filling performance of metal in mold. Thin-walled and high-rib forgings can be formed by die forging. High-speed hammer forging is mostly used for precision forging and extrusion of blades, gears and other parts. There are many kinds of machinery driven by hydraulic pressure made by Pascal's law. Of course, the use is also different according to needs. For example, according to the types of liquids that transmit pressure, there are two categories: hydraulic press and hydraulic press. The total pressure produced by hydraulic press is large, and it is often used for forging and stamping. Forging hydraulic press is divided into die forging hydraulic press and free forging hydraulic press. Die forging hydraulic press needs die, while free forging hydraulic press doesn't need die.
The machine has independent power mechanism and electrical system. With the centralized control of buttons, three working modes can be realized: adjustment, manual and semi-automatic: the working pressure of the machine, pressing speed, no-load quick-drop deceleration stroke and range, all of which can be adjusted according to the process needs to complete the ejection process. There are three process modes: ejection process and stretching process, and each process has two process actions: constant pressure and fixed distance. Constant pressure forming process, ejection after pressing. In the photoelectric safety protection device, an invisible infrared light curtain is set in the protection area between the operator of the forging press and the dangerous working area. Once a certain part of the operator enters the protection area and blocks the light curtain, the control system outputs a signal to the safety actuator of the forging press to make the forging press stop urgently and prevent dangerous action. It can be seen that the photoelectric safety protection device itself can not directly protect the operator, but only sends a signal to the machine tool to stop the dangerous action before a safety accident may occur. Therefore, strictly speaking, the photoelectric safety protection device should be called the photoelectric safety protection control device.
Photoelectric safety protection devices are usually divided into reflective and opposite types. Reflective photoelectric safety protection device consists of controller, sensor and reflector. The light curtain is emitted by the sensor, then reflected by the reflector and received by the sensor. The opposite photoelectric safety protection device consists of a controller, a transmitting sensor and a receiving sensor. The light curtain is emitted by the transmitting sensor and received by the receiving sensor. There are various automatic feeding devices in forging machinery, which are used for sheet metal processing in single machine or automatic stamping line such as open press, closed press, multi-station press and high-speed press. Automatic feeding device generally consists of three parts: material rack and coil straightener mechanism, pneumatic clamp feeding mechanism and waste winding material rack. Material rack and plate straightening machine have three functions: supporting plate rolling, uncoiling and leveling. The uncoiler slightly loosens the steel coil to make it hang freely, so as to reduce the tension of the feeding mechanism in the feeding process and improve the feeding accuracy. The leveling mechanism uses multiple rollers to apply force to the uncoiled coil, so that the plate can be corrected before stamping, which is beneficial to improve the accuracy of the product. Pneumatic pliers feeding mechanism takes compressed air as power to control the opening and closing and reciprocating motion of pliers to complete the feeding of sheet materials. The reciprocating stroke can be adjusted steplessly to meet the requirements of different feeding lengths. The waste take-up rack takes up the punched waste tape. If the waste tape is cut off and recycled during punching, this part is not needed. Stamping die frame Stamping die frame is the most typical functional part of forging machinery, which realized standardization and professional production at the earliest. When punching, blanking, drawing and cutting on a mechanical press, a punching die is essential. The punch and die of the working part of the stamping die are installed on the stamping die frame. Different stamping processes require different punches and dies, but the same stamping die frame can be used. The stamping die frame consists of an upper die plate, a lower die plate, a guide post and a guide sleeve. A series of products have been developed for different specifications of presses, and the standardization of stamping die frames below medium specifications has been realized. There are quite a few professional factories producing stamping dies in China, and stamping dies have been produced and sold as standard parts. However, the large stamping die frame is usually a special order, which is provided to users by the die manufacturer together with the die.