Knuckle type precision punching machine

Abstract

The invention relates to the technical field of punch presses, and particularly discloses a toggle joint type precision punch press. The toggle joint type precision punch press comprises a motor, a crankshaft driven by the motor, a toggle joint type transmission mechanism, and a downward pressing assembly, wherein the toggle joint type transmission mechanism comprises a connection rod, an upper rotating board and a lower rotating board; the first end of the connection rod is rotationally connected with the crankshaft; the upper end of the upper rotating board is used for being rotationally connected with an upper fixing shaft; the second end of the connection rod, the lower end of the upper rotating board and the upper end of the lower rotating board are coaxially and rotationally connected; the lower end of the lower rotating board is rotationally connected with the top of the downward pressing assembly; and the downward pressing assembly vertically moves in the vertical direction under driving of the toggle joint type transmission mechanism. According to the toggle joint type precision punch press, the toggle joint type transmission mechanism is arranged, horizontal movement of the connection rod is converted into vertical movement of a slide block, on the one hand, direct stress on the crankshaft is reduced to protect the crankshaft, and on the other hand, the punching precision can be improved.

Description

technical field [0001] The invention relates to the technical field of punching machines, in particular to a toggle-type precision punching machine. Background technique [0002] Among the pressure equipment currently on the market, the vast majority of punching machines adopt a straight-shaft structure, that is, the crankshaft and the connecting rod are directly connected through bearings or copper tiles. This structure is relatively simple, so it is easy to implement. However, the defects accompanying this structure are also very obvious, mainly manifested in the following points: [0003] (1) When stamping, the reaction force directly reacts to the crankshaft through the connecting rod, and the bearing and the crankshaft are easily damaged; [0004] (2) Due to the direct use of the structure of the small shaft or eccentric wheel, the deformation caused by the speed and stability changes in the production process is directly reflected on the accuracy of the bottom dead c...

AI Technical Summary

Problems solved by technology

[0003] (1) When stamping, the reaction force directly reacts to the crankshaft through the connecting rod, and the bearing and the crankshaft are easily damaged;

[0004] (2) Due to the direct use of the structure of the small shaft or eccentric wheel, the deformation caused by the speed and stability changes in the production process is directly reflected on the accuracy of the bottom dead center, which is difficult to overcome, so it is difficult to improve the accuracy of the punching machine to a new level. The level; the bottom dead center refers to the limit position when the slider slides down;

[0005] (3) The crankshaft is under a large force, which makes the vibration of the punching machine obvious and the noise increases;

[0006] (4) The eccentric load capacity is small

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