Multi-connecting-rod mechanical press driven by three parallel servo motor inputs

Abstract

The invention provides a multi-connecting-rod mechanical press driven by three parallel servo motor inputs, which is characterized in that the press comprises a rack, a three-motor and three-degree-of-freedom parallel mechanism, a connecting mechanism, a toggle rod mechanism and a pressing sliding block, wherein the output end of the three-motor and three-degree-of-freedom parallel mechanism is movably connected with the input end of the connecting mechanism, the output end of the connecting mechanism is movably connected with the input end of the toggle rod mechanism, the pressing sliding block is the output end of the toggle rod mechanism, and the rack is sheathed on the external sides of the three-motor and three-degree-of-freedom parallel mechanism, the connecting mechanism, the toggle rod mechanism and the pressing sliding block. The press has the advantages of simple structure, easiness in control and low manufacturing cost and can well solve the problem that a large-tonnage servo press cannot be constructed because the output torque and the power of the existing servo motor are small.

Description

technical field [0001] The invention relates to a device in the technical field of forging machinery, in particular to a three-servo motor input parallel drive multi-link mechanical press. Background technique [0002] Presses are widely used forging equipment in the field of metal forming processing. There are many varieties and quantities, among which mechanical presses are the most widely used. Traditional mechanical presses generally use various mechanical transmission mechanisms such as crank connecting rods, multi-links or non-circular gear mechanisms, and appropriate component sizes to obtain the slider motion law required by the process, but when the mechanism type and component size After it is determined, the motion characteristics of the slider are also determined, so it is not flexible and difficult to be used in different stamping processes. The CNC servo press is a ball screw or crank driven by a servo motor, and the motion is converted into the motion require...

AI Technical Summary

Problems solved by technology

However, the single-degree-of-freedom mechanism can only be driven by one servo motor in principle. Some servo press drive mechanisms use two servo motors for redundant drive, such as "a new type of servo-driven press" disclosed in Chinese Patent No. 200810177948.9. However, the two servo motors must be synchronized at all times to avoid motion interference

Although this can also increase the input power and increase the forming pressure of the press, it increases the difficulty of the control strategy and makes the control stability worse

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