Numerical control bending machine with smart safety light curtain and safety protection device and method

Abstract

The invention discloses a numerical control bending machine with a smart safety light curtain and a safety protection device. The numerical control bending machine comprises an upper die, a sliding block, a lower die, a work table and the safety light curtain, wherein the upper die is arranged on the sliding block, the lower die is arranged below the upper die and is located on the work table, and the safety light curtain is arranged on the work table. The numerical control bending machine further comprises a linear displacement sensor or an angular displacement sensor. The sliding block is provided with the linear displacement sensor used for directly measuring the movement speed, direction and position of the sliding block or is provided with the angular displacement sensor used for indirectly measuring the movement speed, direction and position of the sliding block. According to the invention, the defects of common safety light curtains special for bending machines in the market are overcome, the safety of operation personnel can be protected in the bending process, and the work efficiency will not be influenced. In addition, the numerical control bending machine is simple in structure and highly practical.

Description

technical field [0001] The invention belongs to the field of electromechanical numerical control equipment, and specifically relates to a numerical control bending machine with an intelligent safety light curtain on-line monitoring and safety protection device and a use method thereof. Background technique [0002] CNC bending machines on the existing market use special safety light curtains for bending machines to protect personal safety during the bending process. The working process of safety light curtains for bending machines can be divided into two areas: dangerous areas and safe areas. Safety protection, the signal of the safety light curtain in the safe area is invalid. [0003] The dangerous area refers to: the upper mold of the bending machine goes down until it touches the bent workpiece. In this area, if shading occurs, a dangerous stop signal needs to be sent immediately to the control circuit of the bending machine to control the upper die of the bending machi...

AI Technical Summary

Problems solved by technology

However, there are two defects in the use of this special safety light curtain for bending machines: 1. The types of upper molds or lower molds are different, and the heights are also different. In this way, changing the upper mold or lower mold of different heights requires readjusting the position detection of the upper mold. board, which reduces work efficiency, and the human uncertain factors added in the adjustment process affect the reliability of safety protection

2. Before bending the workpiece, the operator needs to enter the light curtain area to adjust the alignment and gap consistency of the upper and lower molds. At this time, if the light is blocked, the safety light curtain will be triggered, and an alarm will be generated to stop the slider from going down, so that the mold can be adjusted become difficult and affect the convenience of operation

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