Integral-horizontal-moving pure mechanical toggle rod type drawing cushion with permanent magnet synchronous servo motor for double-ended drive

Abstract

An integral-horizontal-moving pure mechanical toggle rod type drawing cushion with a permanent magnet synchronous servo motor for double-ended drive is of a left-right full symmetry structure. A machine body structure of the drawing cushion comprises a workbench. A lower mold is installed on the workbench. Supporting frames are distributed in the circumferential direction of the lower mold. The lower ends of the supporting frames penetrate through through-holes in the workbench and are fixed to a box body. The two ends of the workbench are fixed to the upper ends of vertical columns. The left side and the right side of the box body are connected with sliding blocks. The sliding blocks are matched with guide rails. The guide rails are fixed to the vertical columns. The lower ends of the vertical columns are connected to a base. The box body is hinged to a main transmission structure through upper toggle rods, and correspondingly, the base is hinged to the main transmission structure through the upper ends of lower toggle rods. A piston cylinder is installed on the upper portion of the middle of the base. The upper end of a piston is connected wit the main transmission structure. A through hole in the lower end of the piston cylinder is filled with compressed air. The drawing cushion is driven by the permanent magnet synchronous servo motor, blank holder force is controlled precisely, the displacement is moved accurately, the structure is simple, the service life is long, the drawing cushion is of a pure mechanical structure, and maintenance is convenient.

Description

technical field [0001] The invention belongs to the technical field of press stretching pad manufacturing, in particular to a purely mechanical toggle-type stretching pad with biaxial extension permanent magnet synchronous servo motors integrally moving in translation. Background technique [0002] During the deep drawing process of the sheet, the press must provide a suitable blank holder force to ensure the correct forming of the sheet and avoid defects such as cracking or wrinkling. The traditional hydraulic stretching pad is composed of a pump station, a fuel tank, complicated hydraulic pipelines, hydraulic cylinders, hydraulic control valves, etc. The pump station is connected to the fuel tank and connected to the hydraulic cylinder through hydraulic pipelines and hydraulic control valves. The up and down movement of the hydraulic piston is realized by filling and discharging the hydraulic oil into the hydraulic cylinder, thereby controlling the displacement of the stre...

AI Technical Summary

Problems solved by technology

The movement of the hydraulic piston is controlled by the hydraulic control valve. The control is cumbersome and the electronic control system is complex. Due to the defects of the hydraulic system itself, the system generates a lot of heat and occupies a large area. In addition, the failure rate is high and the maintenance cost is high.

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