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Variable speed control method for preventing wire sliding in downward preparation of detonating fuse

A detonating cord, sliding wire technology, applied in non-electric variable control, speed/acceleration control, control/regulation system, etc., can solve problems affecting product quality, sliding wire, reducing production efficiency, etc., to avoid the sliding wire problem , the acceleration time is short, the effect of keeping the work efficiency unchanged

Inactive Publication Date: 2018-06-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific performance is that during the pulling process of the detonating cord, the friction clamped by the air claw is less than the drag force of the feeding tray, and the phenomenon of slipping occurs, which greatly reduces production efficiency and affects product quality.

Method used

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  • Variable speed control method for preventing wire sliding in downward preparation of detonating fuse
  • Variable speed control method for preventing wire sliding in downward preparation of detonating fuse
  • Variable speed control method for preventing wire sliding in downward preparation of detonating fuse

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Embodiment Construction

[0016] The implementation process of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] figure 1 It is a model diagram for preventing the problem of sliding wires from occurring according to the present invention, and the quality of the wire-guy claws is M 1 , and the mass of the incoming disk is M 2 , the wire velocity before the detonating cord is taut is V 1 , the wire velocity after the detonating cord is tensioned is V 2 , the gas source pressure is P 0 , the friction coefficient of air gripper is μ 1 , the friction coefficient of the feeding tray is μ 2 , the detonating cord tightening time is Δt, and the contact area between the air claw and the detonating cord is S 1 . The maximum friction force of the air gripper is f 0 , the actual friction force during the motion is f 1 , the friction force overcome by the starting of the feeding tray is F 1 .

[0018] m 1 V 1 2 =(M 1 +M 2 )V 2 2 +F 1 V ...

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Abstract

The invention discloses a variable speed control technology for preventing wire sliding in downward preparation of a detonating fuse in the processing flow of cable initiating explosive devices, and belongs to the field of processing the cable initiating explosive devices. The variable speed control technology comprises the following steps: firstly, building a model based on a momentum theorem anda kinetic energy theorem and determining a critical speed of wire sliding under the condition that the detonating fuse is tightened; secondly, aiming at the built model, verifying and correcting a critical speed value by using experimental process data and determining a final critical speed of the wire sliding; thirdly, determining the relaxation speed of each stay wire according to historical experience data and predicting the tightening moment of the detonating fuse; fourthly, designing a switching control strategy and controlling the stay wires at the maximum wire staying speed higher than critical speed under the condition that the detonating fuse is loosened; controlling the stay wires at the speed lower than the critical speed under the condition that the detonating fuse is predicted to be bound to be tightened, thereby keeping working efficiency unchanged. According to the variable speed control technology disclosed by the invention, the condition that the working efficiency is reduced due to wire sliding in the factory production can be prevented; by mean of a strategy of controlling the switching speed of the stay wires, the problem of wire sliding is avoided and the working efficiency is kept unchanged.

Description

[0001] The present invention is a technology for preventing slippage in the processing of cable pyrotechnics, and is a technology for preventing slippage and improving production efficiency by predicting the time model of slippage and then controlling and adjusting the speed of the pullwire. Background technique [0002] In the production of pyrotechnic products, in the lower production of cable products, the movement of the feeding tray is driven by the action of the pull wire. However, the movement of the feeding tray is uncontrolled, so the degree of tightness of the detonating cord is inconsistent during the lowering of the drawing wire. If a certain speed is used to pull the wire, there will be a slipping phenomenon. The specific performance is that during the detonating cord pulling process, the friction of the air claw clamping is less than the drag force of the feeding tray, and the phenomenon of slipping occurs, which greatly reduces the production efficiency and affe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D13/00
CPCG05D13/00
Inventor 魏善碧柴毅尚敖男何军刘晓宇刘文宇
Owner CHONGQING UNIV
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