Non-contact fixed length system

Abstract

The invention discloses a non-contact type fixed-length cutting system which comprises a first conveyer belt, a second conveyer belt, a first conveying and driving device, a second conveying and driving device, a first detection switch, a second detection switch and a controller, wherein the first conveyer belt is positioned in front of the second conveyer belt in the conveying direction in a connecting manner; the first and second conveying and driving devices respectively drive the first and second conveyer belts to carry out linear conveying; a plurality of reflective areas are arranged at intervals on the first conveyer belt in the conveying direction; the first and second detection switches are fixedly mounted right above the first conveyer belt and can emit lasers towards the positions of the reflective areas of the first conveyer belt; the reflective areas can reflect the lasers emitted from the first and second detection switches; the first and second detection switches can receive the lasers reflected by reflecting plates and transmit signals to the controller; the controller can control each of the first and second conveying and driving devices to perform action. The non-contact type fixed-length cutting system is high in detection precision, can maintain a long-term stable fixed-length cutting precision, avoid material squeezing and ensure safe fixed-length cutting.

Description

technical field [0001] The invention relates to an automatic equipment for the production of automobile wheel hubs, in particular to a non-contact length fixing system. Background technique [0002] In existing building machines, especially car radial tire building machines, the cord is conveyed, fixed-length detected and cut through the conveyor belt, but the cord rubber is thin and sticky, and the rubber is easy to stick to the conveyor belt. The curtain length fixing method is usually completed by the cooperation of switch detection and servo motor. There are two existing fixed-length detection methods: [0003] 1. Use a sensor with color recognition function to sense the front end of the curtain by sensing the color of the curtain and the conveyor belt. There are two main disadvantages. One is that the conveyor belt is easy to glue. The color is close, and it is easy to detect by mistake; the second is that the sensor is judged by the amount of reflection, and the posi...

AI Technical Summary

Problems solved by technology

[0003] 1. Use a sensor with color recognition function to sense the front end of the curtain by sensing the color of the curtain and the conveyor belt. There are two main disadvantages. One is that the conveyor belt is easy to glue. The color is close, and it is easy to detect by mistake; the second is that the sensor is judged by the amount of reflection, and the positioning error is large when the color contrast is not particularly strong

[0004] 2. There is also a more commonly used structure of pressure roller swing. Since the cord is thin, the measured value is amplified by the principle of the swing rod, and the measurement is more accurate. However, the problem brought by this structure is that if the swing restoring force is too large during the swing process Small, when conveying at high speed, the pendulum will jump and cause false detection. If the restoring force is too large, the pressure roller will press the rubber tightly on the conveyor belt, and the rubber will often squeeze out when the rubber sticks to the conveyor belt. cause an accident

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