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Spot welding system

A spot welding and welding machine technology, applied in welding equipment, resistance welding equipment, manufacturing tools, etc., can solve problems such as spot falling off, product quality impact, welding machine failure, etc., and achieve the effect of improving manufacturing productivity and achieving reliability.

Pending Publication Date: 2021-05-04
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, in a system that performs spot welding, abnormalities such as so-called spot welding dropout (welding dropout, no power supply) and welding machine failure may occur due to unexpected situations. When the welding is abnormal, of course it will affect the quality of the product

Method used

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Embodiment Construction

[0031] Below, refer to Figure 1 to Figure 3 Next, a spot welding system according to one embodiment will be described.

[0032] Such as figure 1 with figure 2 As shown, the spot welding system 1 of the present embodiment is, for example, a system provided in a production line and used to implement resistance spot welding to work objects such as automobile bodies. The spot welding system 1 is configured to include: a spot welding machine (welding device) 6, which Consists of a welding torch 7 equipped with an electrode rod, and a welding timer (control unit on the welding machine side) 8. The welding timer 8 controls the time when the welding current flows, the magnitude of the current, the pressurization time (preload time), and the preheating time. , holding time (maintenance time), cooling time (cooling time), etc., the action time required for a series of actions (sequences) of welding; the multi-joint robot 4 installs the welding torch 7 driven by a servo motor on the...

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PUM

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Abstract

The invention provides a spot welding system of high reliability which, when an abnormality such as a spot missing in spot welding occurs, is capable of more precisely and accurately detecting this immediately. The spot welding system comprise a robot-side system having a robot and a robot-side control unit which controls driving of the robot; and a welder-side system having a welding gun mounted to the robot, and a welder-side control unit, in which the robot-side system includes: a storage unit which stores in advance appropriate thickness information of a welded part of members on which conducting spot welding; a welded-part thickness measurement unit which measures thickness of the welded part of members on which conducting spot welding; and a comparative determination unit which determines quality by comparing thicknesses of a welded part at the time of a welding start command and at the time of a welding completion command, and comparing with the appropriate thickness information of the welded part stored in the storage unit.

Description

technical field [0001] The invention relates to a spot welding system. Background technique [0002] Spot welding is often used as a method of joining metal members in many industries and technical fields, such as the joining process of automobile bodies, due to its advantages in weight reduction compared to riveting, shorter welding time, and higher work efficiency. [0003] Spot welding (spot welding, resistance welding) is a type of resistance welding, in which two metal materials are brought into contact by overlapping, etc., and a large current is applied while applying pressure to the contact part with a round rod-shaped copper alloy electrode, and the resistance is used to The metal material of the contact portion generates heat to locally melt the metal material of the contact portion to perform bonding. [0004] In addition, in a production line such as a joining process of an automobile body, a spot welding system equipped with a robot and a robot welder (robot we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/11B23K11/36
CPCB23K11/11B23K11/36B23K31/125B23K11/252B23K11/314
Inventor 天方康裕
Owner FANUC LTD