Main drive mechanism of flexible numerical control turret punch press and working method

Abstract

The invention discloses a main drive mechanism of a flexible numerical control turret punch press and a working method. The main drive mechanism comprises a crank-link mechanism, a swing frame and a threaded pair. The swing frame is hinged to a rack, the crank-link mechanism and the threaded pair. The crank-link mechanism comprises a crank and a link rod, the crank is rotatably connected with the rack, and the link rod is hinged to a rotating shaft of the crank and the swing frame. The angle between the crank and the link rod can be adjusted. The threaded pair comprises a nut, a threaded rod, a supporting rod and a threaded pair driving part, wherein the nut is fixed in height position, and the threaded rod is matched with the nut and hinged to the supporting rod and the swing frame. The threaded rod can be driven by the threaded pair driving part to achieve lifting and locking. After the adoption of the structure and the method, the plate thickness and the magnitude of punching force can be dynamically adjusted. In addition, the mechanism is good in force-increasing characteristic controllability and acceleration characteristic controllability, and the power utilization rate of a motor is high. Under the condition of the same motor power, a higher punching speed and higher punching force can be achieved.

Description

technical field [0001] The invention relates to a numerically controlled turret punch press and a working method, in particular to a main transmission mechanism and a working method of a flexible numerically controlled turret punch. Background technique [0002] CNC turret punch presses are important equipment in the field of sheet metal processing. Turret punch presses can be divided into three types: mechanical, hydraulic and all-electric servo according to the power source type of its main transmission mechanism. Due to the outstanding advantages of fast speed, high precision, energy saving, environmental protection, and controllable slider movement curve, the all-electric servo punch press has gradually replaced the traditional mechanical and hydraulic structures in recent years and has become the mainstream product in the industry. [0003] The existing all-electric servo CNC turret punch press technology can be divided into various mechanism forms such as crank slider ...

AI Technical Summary

Problems solved by technology

[0006] 1. Poor flexibility: The kinematics and mechanical properties of the mechanism cannot be adjusted, that is, the force-increasing and speed-up characteristics of the mechanism are fixed, and cannot be dynamically adjusted according to the thickness of the punched plate and the size of the punching force, resulting in small The punching speed is not fast under load, and the punching force is not strong when punching at a slow speed

[0007] 2. The load of the support bearing of the crankshaft is too large, and the entire punching load acts on the support bearing of the crankshaft, which is easy to cause damage to the bearing

[0008] 3. Large stroke and constant force processing mode cannot be realized, and forming processing such as deep drawing cannot be completed

[0010] At present, the existing two-degree-of-freedom hybrid drive mechanical servo press is basically a highly nonlinear mechanism, and its force and speed-up characteristics are affected by many factors. It is difficult to extract control parameters and poor controllability

In addition, as the stamping curve of the punch changes, the utilization rate of the motor power will also change, and it cannot be guaranteed that the motor is working at full load under all working conditions, resulting in waste of power

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