Device for detecting tail end of automobile punch progressive die material strip

Abstract

The invention relates to a device for detecting a tail end of an automobile punch progressive die material strip. The device comprises a lower mold holder, a concave mold liner plate and a concave mold plate, and also comprises a detector fixed seat which is fixed on the tail ends of the lower mold holder and the concave mold plate, a detector is fixedly installed on the fixed seat, the detector is provided with a detection rod which is provided with a material strip contact end, a spring, a detector body, a nut and a washer, and the detector is connected with a punch press control switch through a detector switch connecting wire. By adopting the device, the detection precision is high, since the detection rod on the material strip contact end does not contact the material strip at the moment when error in feeding is discovered, a circuit is disconnected, a punch press is stopped working, so that the mold is stopped, the production loss is reduced, and the production safety is improved. A material supporting block device is arranged in the mold, so that after the mold is locked, the problem that the material strip cannot bounce up due to the excessively high pressure of an upper mold and a lower mold can be effectively prevented. The end part of the detector also plays a role in stopping the material, so that a feeding step pitch can be better controlled, and simplicity and convenience in operation can be realized.

Description

technical field [0001] The invention belongs to the field of stamping equipment, and in particular relates to a detection device for the tail end of an automobile stamping progressive die material. Background technique [0002] Multi-station progressive dies are generally used for automatic feeding. Due to the high stamping speed, material misfeeding may occur during the stamping process, the feeding is not in place, the material arches, and the workpiece does not eject or fall, etc., resulting in failures. The mold cannot work normally, or even cause damage to the mold or press. Therefore, safety detection devices will be installed in production. At present, the working principle of the more commonly used detection device in stamping is: the round punch first punches a round hole at the scrap position of the material belt, and the hole is the pilot hole. When the next step is reached, the head of the detection pin is misfeed It will enter the hole to check the accuracy o...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that in the traditional detection device, the detection of misfeeding is not sensitive enough, and the punching machine cannot stop working in time, causing damage to the mold, and even accidents such as smashing the mold.

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