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Die casting quality on-line detection method

A detection method and die-casting technology, applied in the direction of testing metals, material inspection products, etc., can solve the problems of large human interference, low efficiency, and inability to do quantitative analysis, so as to improve the hit rate of defective products, improve production efficiency and product quality. Effect

Inactive Publication Date: 2012-11-07
ZHEJIANG UNIV +1
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Problems solved by technology

The disadvantages of this method are: the injection process parameters cannot be directly displayed, and it needs to be obtained by measuring the curve, the efficiency is low, there is a lot of human interference, and quantitative analysis cannot be done; it is difficult to find defective products in time during the die-casting process, and it is difficult to control product quality

Method used

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  • Die casting quality on-line detection method
  • Die casting quality on-line detection method

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Embodiment Construction

[0032] image 3 A schematic structural block diagram of a detection device used in the detection method of the present invention is shown. The device includes a displacement sensor, a first pressure sensor, a second pressure sensor, a data acquisition module and a computer. Wherein, the displacement sensor is connected with the hammer head of the die-casting machine to detect the position of the hammer head; the displacement sensor is also connected with the data acquisition module. The first pressure sensor is connected with the rod chamber of the injection cylinder of the die-casting machine for detecting the pressure of the rod chamber, and the first pressure sensor is also connected with the data acquisition module. The second pressure sensor is connected with the rodless chamber of the injection cylinder of the die-casting machine to detect the pressure of the rodless chamber, and the second pressure sensor is also connected with the data acquisition module. The data ac...

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Abstract

The invention discloses a die casting quality on-line detection method, comprising the steps of: obtaining standard pressing-shooting process parameters, sampling time and sampling rate through the sampling process; adopting two pressure sensors which are respectively connected with a pressing-shooting cylinder and a hammerhead to respectively collect pressing-shooting pressure data and pressing-shooting position data; obtaining pressing-shooting speed data through the pressing-shooting position data; extracting pressing-shooting process parameters from the pressing-shooting pressure data, the pressing-shooting position data and the pressing-shooting speed data and displaying the pressing-shooting process parameters; obtaining a database of the pressing-shooting process parameters on the basis of the obtained pressing-shooting process parameters and then obtaining the probability distribution data of the pressing-shooting process parameters according to the database of the pressing-shooting process parameters; and obtaining an alarm threshold value according to the probability distribution data of the pressing-shooting process parameters, the sampling rate and the standard pressing-shooting process parameters; and judging whether the pressing-shooting process parameter of current die casting exceeds the alarm threshold value; and if so, generating a quality alarm signal, and if not, repeating the steps from the step two. The method has the advantage that the pressing-shooting process parameters can be automatically extracted and displayed.

Description

technical field [0001] The invention relates to a method for detecting the quality of a die casting. Background technique [0002] The process parameters of the traditional die-casting machine are determined by analyzing the actual quality of the die-casting sample and repeatedly adjusting according to the analysis results. In the existing technology, in the early stage of die-casting a new product, the craftsmen continuously adjust the injection process parameters to test the quality of the die-casting parts and test the quality of the die-casting parts until the process parameters are adjusted to the various performance indicators of the die-casting parts All meet customer requirements. Record the injection process parameters in this state as the standard injection process parameters. Once the working performance of the die-casting machine changes during the production process, if it cannot be found and corrected in time, a large number of defective products will be prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/20G01N33/44B22D17/32B29C45/76
Inventor 孔晓武凌振飞魏建华马冲李佳鑫
Owner ZHEJIANG UNIV
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