Introduction to the connecting rod punch of the gantry punch

Gantry punch; A connecting rod type punch with a connecting rod drive mechanism and a slow and unaffected speed near the bottom dead center. This connecting rod punch involves two eccentric connecting rods between the driving gear and the crankshaft. When the driving gear rotates, the crankshaft moves at different speeds due to changes in the connecting angle of the connecting rods. This linkage mechanism is different from other linkage mechanisms in that there are few connection points in the compression part and the overall clearance is small. The connecting rod mechanism has higher torque capacity than the elbow rod mechanism, and can achieve forming at higher positions of the bottom dead center. The driving method of vertical connecting rod punch press is to add two connecting rods, namely vertical connecting rod and fulcrum connecting rod, to the ordinary elbow bar mechanism, so that the connecting rod directly connected to the slider during processing remains basically vertical, and the forming load can be transmitted vertically through the vertical connecting rod.

1. The connecting rod type punch structure is equipped with a first connecting rod above the frame, and a second connecting rod is connected to the lower end of the first connecting rod. The opening in the center of the second connecting rod is sleeved on the eccentric shaft, and the third connecting rod is connected to the lower end of the second connecting rod. The lower end of the third connecting rod is combined with an adjusting screw, and the adjusting screw is connected to the screw fixing seat, while the lower edge of the fixing seat locks the slider; Thus, the operation of the eccentric shaft drives the second connecting rod to move up and down according to the variation of its eccentric circumferential distance, and the second connecting rod drives the first and third connecting rods to swing up, down, left, and right. The connection length and angle of these three connecting rods change the swing angle, achieving the goal of prolonging stroke time, slow angle displacement, shortening return time, fast angle displacement, and changing the stroke curve.

2. Due to the diagonal compression of the connecting rod on the slider in ordinary mechanical stamping machines, the slider is subjected to significant adverse lateral forces. Therefore, this driving method has higher accuracy than ordinary driving methods and is more suitable for high-precision machining. At a position 5mm above the bottom dead center, the slider of a regular elbow punch is subjected to a lateral force of about 10% of the forming force, while the slider of a vertical link punch is not more than 1%. This type of stamping machine is suitable for processing that requires high alignment between the upper and lower molds. The SL driving method, like the VL driving method, is a driving method where the lateral force acting on the slider is almost zero, but its stroke can be made longer, suitable for extrusion processing where there is little change in speed starting from a higher position above the bottom dead center. This connecting rod mechanism ensures that the connecting rod maintains a basic vertical state during operation. Vertical connecting rod punch machines are often used for forward feeding processing, but in complex shape forming, the first part is processed by forward feeding, and the second half is processed by a composite method of multi station conveying. There are various types of conveying devices available, such as suction cup or claw type 3D servo multi station conveying devices.