Ejector rod interference checking device

Abstract

The invention discloses an ejector rod interference checking device. The device comprises a test plate and test bars, wherein the test plate is provided with a plurality of ejector rod holes, and theejector rod holes are in fit with die holder through holes of a lower die holder; each test bar is of a cylindrical structure and is movably arranged in one ejector rod hole, and the length of each test bar is greater than the depth of each die holder through hole; and the test plate is attached to the lower surface of the lower die holder, and the test bars are inserted into the die holder through holes. Through the device, a simulation function on an air cushion ejector rod is achieved; before a stamping procedure, the air cushion ejector rod is in inserted fit with the lower die holder first, visual testing and checking on interference are realized in advance, an unqualified lower die holder can be machined and corrected again in time, the air cushion ejector rod on a machine table is protected, frequent maintenance and replacement are avoided, economic cost and manpower cost are saved, and meanwhile production progress is guaranteed.

Description

technical field [0001] The invention relates to the field of stamping dies, in particular to an ejector pin interference troubleshooting device. Background technique [0002] The drawing die is a process in which the flat-shaped blank is plastically deformed to obtain a stable spatial shape through the joint action of the die (upper die), blank holder, and punch (lower die) under the action of the press. equipment. According to the different equipment used, drawing dies can be divided into single-action drawing dies and double-action drawing dies. [0003] Among them, the single-action drawing die needs to use the air cushion ejector (also called bed ejector) on the machine table. refer to figure 1 , during the stamping work, the lower mold base is locked on the machine table, the air cushion ejector pin passes through several through holes in the lower mold base, and lifts up the blank holder, and then the upper mold presses down in the vertical direction Movement, so t...

AI Technical Summary

Problems solved by technology

[0004] Due to the possible dimensional error of the lower mold base during processing, the air cushion ejector pin cannot pass through the mold base through hole of the lower mold base, and interference occurs inside the lower mold base, causing the air cushion ejector pin to be damaged

Moreover, the interference occurs inside the lower mold base, the lifting process is difficult to be observed, and the operator cannot take measures before the interference occurs, resulting in the need for maintenance or replacement of the air cushion ejector pin, resulting in great economic and labor costs

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