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Method for accurately finding upper dead point of crank connecting rod pressing machine

A technology of crank connecting rod and press, applied in the direction of press, punching machine, manufacturing tool, etc., can solve the problems of low efficiency, affecting processing accuracy, many human factors, etc., and achieve the effect of simple operation

Active Publication Date: 2011-08-31
NANJING ESTUN AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is greatly affected by the resolution ability of the human naked eye, and there are many human factors, which often affect the processing accuracy due to the inaccuracy of the top dead center; and it often needs to be adjusted many times, which is inefficient

Method used

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  • Method for accurately finding upper dead point of crank connecting rod pressing machine
  • Method for accurately finding upper dead point of crank connecting rod pressing machine
  • Method for accurately finding upper dead point of crank connecting rod pressing machine

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Embodiment Construction

[0018] The application object of the present invention is a crank-connecting rod press. The crank-connecting rod press controls the rotation of a servo motor or an ordinary AC asynchronous motor. The motor drives the crank, and transmits the eccentric rotational power of the crank to the slider through the connecting rod to realize For the up and down movement of the slider, an angle measuring device is installed on the rotation axis of the crank without a fixed slider position measuring device installed on the slider side. Such as figure 1 , R is the radius of the crank, L is the length of the connecting rod, θ is the difference between the current angle of the crank and the top dead center.

[0019] The following components are set on the crank press: motion control component, which controls the crank to rotate freely according to the angle; displacement measurement component, which measures the distance difference between the two upward or downward movements of the slider; ...

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Abstract

The invention relates to a method for accurately finding an upper dead point of a crank connecting rod pressing machine. According to a crank connecting rod mechanism principle, the rotation angle of a crank and the movement distance of a slide block are in a nonlinear relation, i.e., the walking distances of the slide block varies when the crank is rotated by the same angle at different positions; and the difference between a current angle of the crank and the upper dead point is resolved according to the relation between the rotation angle increment of the crank and the moving distance increment of the slide block to obtain the position of the upper dead point. The position of the upper dead point of the slide block can be found accurately at the deviation of + / - 1 equivalent angle counting unit without externally connecting special slide block position measuring equipment or changing the original hardware structure. The method is easy and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of press machine tool control, relates to a crank connecting rod press, in particular to a method for accurately finding the top dead point of a crank connecting rod press. Background technique [0002] Many existing crank-connecting rod presses are not equipped with a slider position measuring device on the side of the slider movement, but are only equipped with a crank angle measuring device on the rotating shaft of the crank. For this type of equipment, the determination of the top dead point of the slider is often determined by observing the up and down movement of the slider with the naked eye. This method is greatly affected by the resolution ability of the human naked eye, and there are many human factors, which often affect the processing accuracy due to the inaccuracy of the top dead center; and often need to be adjusted many times, which is inefficient. Contents of the invention [0003] The pro...

Claims

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Application Information

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IPC IPC(8): B30B15/14B30B1/06
Inventor 徐正华张得礼
Owner NANJING ESTUN AUTOMATION CO LTD
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