Toggle lever metal extruder

Abstract

The invention discloses a toggle lever metal extruder, which comprises a framework-type rack and is creatively characterized in that a workbench is arranged at the lower part of the rack, a sliding block is arranged above the workbench and can reciprocate on the rack along a vertical direction, and two sides of the work bench are provided with lateral pressing cylinders; a toggle lever mechanism is arranged on the upper part of the rack and mainly comprises an upper support, an upper toggle lever, a lower toggle lever and a lower support; and a driving mechanism is arranged outside the toggle lever mechanism and comprises a hydraulic cylinder, a first connecting lever and a second connecting lever. A hydraulic cylinder and the lateral pressing cylinder act to drive an upper die, a left male die and a right male die to move to a lower die on the workbench for pressing. The driving mechanism drives the toggle lever mechanism to move the sliding block, the sliding block is fast in a return downward trip, and a working stroke is slow and stable; in addition, in the working stroke, the stamping pressure has long duration, the pressing efficiency is high, the stress bearing effect of the rack is good, so that the installed power is reduced and the production cost is lowered.

Description

technical field [0001] The invention relates to a metal extruder, especially a toggle metal extruder used for pressing oil drill pipes. Background technique [0002] In the extrusion molding of oil drill pipes, the traditional method uses a conventional press for pressing, that is, the slider is directly driven by the master cylinder above it to move up and down, and side pressing cylinders are set on both sides of the workbench. Use the slider to drive the upper mold and the lower mold on the workbench to extrude the rod body of the oil drill pipe, and the side pressing cylinder drives the left and right punches to assist in forming the concave cavity at both ends of the oil drill pipe. [0003] The disadvantage of this kind of conventional press is that it is necessary to use a large-tonnage frame hydraulic press of more than 1200T. The hydraulic oil in the main cylinder of the small-tonnage conventional hydraulic press is compressed during pressure maintenance, which wil...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of this kind of conventional press is that it is necessary to use a large-tonnage frame hydraulic press of more than 1200T. The hydraulic oil in the main cylinder of the small-tonnage conventional hydraulic press is compressed during pressure maintenance, which will easily cause flashing of oil drill pipes, and rough turning is required first. Finishing can be carried out later, and the work efficiency is low, so the cost of pressing and forming with conventional presses is very high

In addition, when the side press cylinder is installed on the frame, the cylinder port flange is usually used to directly fix it on the frame through bolt connection. The bolts are easy to break and need to be replaced regularly, which affects normal production

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