4results about How to "Good motion stability" patented technology

The invention relates to an injection molding part ejection mechanism and method and an injection molding device, and belongs to the field of injection molding machines. The injection molding part ejection mechanism comprises a support assembly and a sliding plate slidably connected with the support assembly, a plurality of lead screws extending in the sliding direction of the sliding plate are arranged on the support assembly, and the sliding plate is rotationally connected with the lead screws; the sliding plate is connected with an ejector pin, and the lead screw is in transmission connection with a motor. According to the ejection mechanism, the multiple lead screws are symmetrically arranged, the multiple lead screws are driven by the motor to synchronously rotate to push the ejector plate to achieve the ejection action, the unbalance loading torque is eliminated through the symmetrical arrangement of the multiple lead screws, the movement stability is good, the response speed is high, the precision in the aspects of positioning and synchronization is high in the mode that the lead screws are driven by the motor, the structure is simple, stability is good, and energy consumption is low; and the risk of oil leakage is avoided.

The invention discloses a feedforward compensation method and system based on acceleration feedback, and the method comprises the steps: obtaining and analyzing a motion instruction of a controller, determining expected speed information and expected acceleration information of a controlled object, determining an expected feedforward resultant force based on the expected speed information and the expected acceleration information, and determining a feedforward control signal based on the expected feedforward resultant force; determining the acceleration feedback force of the controlled object based on the real-time acceleration information of the controlled object; determining an acceleration feedback compensation force based on the acceleration feedback force, and determining an acceleration feedback compensation signal of the controlled object based on the acceleration feedback compensation force; and synthesizing the feedforward control signal and the acceleration feedback compensation signal to obtain a motion control instruction of the controlled object, and controlling the controlled object to move according to the motion control instruction. According to the method, open-loop feedforward prediction and closed-loop acceleration observation feedback are deeply fused, the robustness of external interference and internal reference change is enhanced, mechanical resonance is effectively inhibited, and the trajectory tracking precision, the anti-interference capability and the motion stability are improved.

This utility model discloses a linear guide rail for CNC machine tools with adjustable counterweights, including a base. Linear guide rails are fixedly mounted on both sides of the top of the base, and the two linear guide rails are slidably connected to a slider. A first U-shaped frame is fixedly mounted on one side of the top of the slider. This utility model features a first fixed pulley on the slider and a second fixed pulley on the base, connected by a transmission belt. A T-shaped frame at the other end of the transmission belt is slidably connected to the inner wall of the U-shaped guide rail. Limiting pins are mounted on the T-shaped frame, and multiple counterweight plates are inserted through these pins. By inserting counterweight plates through the T-shaped frame and easily increasing or decreasing the number of counterweights, the stress state of the entire guide rail system can be flexibly adjusted according to different processing tasks or slider load changes. This helps optimize motion smoothness and reduce impact and vibration during operation.