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Feedforward type electric resistance welding quality monitoring system and method

A quality monitoring and resistance welding technology, applied in resistance welding equipment, welding monitoring devices, welding power sources, etc., it can solve the problem that the current cannot stably control the quality of resistance welding, avoid the generation and overflow of welding defects, and achieve high accuracy. , easy to monitor and manage the effect

Active Publication Date: 2019-04-23
武汉百舸自动化工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a feed-forward resistance welding quality monitoring system and method, the purpose of which is to detect various states of the resistance welding torch, so that the feed-forward monitoring resistance welding quality, thereby solving the technical problem that the current online detection in the prior art cannot stably control the quality of resistance welding

Method used

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  • Feedforward type electric resistance welding quality monitoring system and method
  • Feedforward type electric resistance welding quality monitoring system and method
  • Feedforward type electric resistance welding quality monitoring system and method

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Embodiment 1

[0080] A feed-forward resistance welding quality monitoring system, such as figure 1 As shown, it includes a server and a sensor group, the sensor group is arranged on a fixed column, the fixed column is located on one side within the range of movement of the welding torch, and is connected to the server through Ethernet.

[0081] The sensor set, such as figure 2 As shown, it includes an analog sensing signal detection window, an A / D signal acquisition and processing circuit, a visual signal detection window and a lower computer; the analog sensing signal detection window is connected to the A / D signal acquisition and processing circuit, The A / D signal acquisition and processing circuit and the visual signal detection window are connected to the lower computer; the lower computer is connected to the server signal.

[0082] The analog sensor signal detection window and the visual signal detection window are exposed outside the packaging box and arranged side by side; the A / D ...

Embodiment 2

[0089] A feed-forward resistance welding quality monitoring method, comprising the following steps:

[0090] (1) Control the resistance welding torch to be detected to periodically enter the area of ​​the feedforward resistance welding quality monitoring system provided in Embodiment 1, and be respectively in the sensing signal detection window and the visual signal detection window; specifically:

[0091] Write a test program by PLC to start the system. The program periodically controls the welding robot, which is equipped with a welding torch. The line body PLC program will control the mechanical arm on the welding robot to move the welding torch to the area of ​​the feedforward resistance welding quality monitoring system provided in Embodiment 1, which are respectively in the sensor signal detection window and the visual signal detection window.

[0092] (2) The lower computer controls the A / D signal acquisition and processing circuit to collect the analog signal detected b...

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Abstract

The invention discloses a feedforward type electric resistance welding quality monitoring system and method. The system includes a server and a sensor group fixedly arranged in a working area and non-working area of an electric resistance welding gun, the sensor group is in signal connection with the server, and the sensor group includes an analog quantity sensing signal detection window, an A / D signal acquisition processing circuit, a visual signal detection window and lower computer. The method comprises the following steps that (1) the electric resistance welding gun to be detected is controlled to be periodically in the sensing signal detection window and the visual signal detection window; (2) analog quantity signals detected by the analog sensing signal detection window are collected; (3) end face pictures of upper and lower electrode caps are collected; and (4), whether the analog quantity signals are within a normal range is judged, and whether the upper and lower electrode caps are centered and the grinding states of the electrode caps are judged according to the upper and lower electrode cap pictures. Early warning can be carried out, maintenance and repair are pulled, and therefore generation and overflow of defective solder joints are reduced or even avoided.

Description

technical field [0001] The invention belongs to the field of industrial automation, and more specifically relates to a feedforward resistance welding quality monitoring system and method. Background technique [0002] Resistance welding is a high-efficiency welding method for connecting metal workpieces together. After combining the weldments, pressure is applied through electrodes, and the resistance heat generated by current passing through the contact surface of the joint and the adjacent area is used for welding. Resistance welding is widely used in industrial mass production of automobile manufacturing, hardware and home appliances, etc. For example, there are as many as several million solder joints on new passenger planes. The main characteristics of resistance welding are that the welding voltage is very low (about 70V), the welding current is very large (9,000 to 10,000 amperes), and the welding time to complete a solder spot is extremely short (hundreds of millisec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/00B23K11/36B23K11/25
CPCB23K11/00B23K11/252B23K11/36
Inventor 姚其伟朱胜胜
Owner 武汉百舸自动化工程有限责任公司
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