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A printing machine variable tension control method

A tension control and printing machine technology, applied in printing machines, general parts of printing machinery, printing, etc., can solve the problems of constant tension adjustment and large waste products, and achieve the effects of reducing waste products, improving performance and reducing total cost

Active Publication Date: 2017-08-01
SHAANXI BEIREN PRINTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a variable tension control method for a printing machine, which solves the problem in the prior art that the tension adjustment amount does not change during the process of starting up and speeding up and down, resulting in a large amount of waste products

Method used

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] A method for controlling variable tension of a printing press satisfies the following functional relationship when controlling the speed of the printing press:

[0023] P=-Alnv+P 0 +B (1)

[0024] In the formula (1), P represents the tension adjustment amount,

[0025] v represents the speed of the machine,

[0026] P 0 Indicates the adjustment amount of the tension when the machine reaches a steady state;

[0027] A and B are adjustment parameters,

[0028] The relationship between A and B satisfies B=Aln(V max ) (2)

[0029] In formula (2), V max is the maximum speed of the machine;

[0030] Among them, A can change the decay speed and initial value of the tension adjustment amount, A=0.023mr 2 , where m is the mass of the roll and r is the radius of the roll. The value of A is related to the quality and radius of the mate...

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Abstract

The invention discloses a variable tension force control method for a printing machine, which is characterized in that a following function relationship P=-Alnv+P0+B is met in the process of controlling the speed of the printing machine, wherein P is a tension force adjustment amount; v is the speed of the machine; P0 is a tension force adjustment amount when the machine reaches a stable state; both A and B are adjustment parameters; the relationship between A and B meets B=Aln(Vmax); Vmax is a maximum speed of the machine; A=0.023 mr<2>; m is the mass of roll materials; r is the radius of the roll materials. According to the variable tension force control method for the printing machine, the problem that a mass of reject products are produced due to the fact that the tension force adjustment amount is invariable in the processes of machine starting, and speed increasing and in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of printing equipment, and relates to a method for controlling tension of a printing machine, in particular to a method for controlling variable tension of a printing machine. Background technique [0002] Under the conditions of the prior art, during the printing process of the printing machine, when the machine speeds up and down, the adjustment of the tension control of the machine remains unchanged. When the machine is started, it needs to overcome the huge moment of inertia to complete the acceleration process. The machine will always produce a large amount of waste products when the machine speeds up from a standstill to the highest speed. Take a 250m / min printing machine as an example. It is: 0-60m / min will produce a lot of waste products, 60-250m / min will produce a small amount of waste products. These waste products are all caused by overcoming the moment of inertia, which will cause the total cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/16
Inventor 刘民望
Owner SHAANXI BEIREN PRINTING MACHINERY
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