Detection device for coping amount of electrode cap of welding equipment

Abstract

The utility model discloses a device for detecting the coping amount of an electrode cap of welding equipment, the welding equipment comprises a robot and a PLC (Programmable Logic Controller), a flange at the tail end of the robot is provided with an Omron proximity sensor, and the Omron proximity sensor is over against the electrode cap of the welding equipment positioned below and is electrically connected with the PLC; and a gripper of the robot is used for clamping the to-be-welded product by the welding equipment and transferring the welded product. According to the utility model, the robot is used as an executor by utilizing the characteristic of accurate action of the robot, and the Omron proximity sensor is arranged on a flange at the tail end of the robot, so that the influence on the action track of the robot due to position occupation is reduced; the loss height is measured by comparing the loss of the new electrode cap with the loss of the electrode cap which is close to the limit; and the detection range of the robot is set according to the measured loss height.

Description

Technical Field

[0001] The utility model relates to the field of welding equipment, in particular to a device for detecting the grinding amount of an electrode cap of welding equipment. Background Art

[0002] Floor welding equipment is common in the automotive welding industry and has a wide range of uses. It can flexibly respond to various needs, such as: nut welding, screw welding, spiral tube welding, plate spot welding, etc. can all be produced using floor welding equipment.

[0003] During the use of floor-standing welding equipment, the electrode cap will be worn out due to the welding process. During the welding process, the electrode cap often needs to withstand 1000A-3000A welding current, 1000-2000 degrees welding temperature, and 100-3000N.M pressure; and the electrode cap is generally made of brass. When brass is affected by oxidation reaction at high temperature, an oxide layer will gradually form on the surface, resulting in color changes. Because the oxide produced by the electrode cap is between the parts during welding, the contact area is increased, resulting in insufficient welding temperature during welding, insufficient welding penetration, and insufficient welding strength.

[0004] In order to avoid the above problems, the usual practice is to use a test plate to perform continuous welding for 300 times, then fully destroy the welding quality test, calculate the upper limit of the number of electrode cap welding times, and control the number of welding not to exceed the upper limit. When the number of welding times reaches the set number, the electrode cap will be ground, and the oxide will be removed by cutting the surface of the electrode cap with a rotating blade to restore the smoothness of the electrode cap.

[0005] There is a certain amount of loss in the cutting electrode cap, and this loss does not have a fixed value. The robot has a complete function of detecting electrode cap loss to detect and adjust the problems caused by electrode cap loss; and the manual ground welding electrode cap is repaired by using a file to remove oxides. The loss after grinding has no effect on the manual work. The manual work only needs to visually check that the electrode cap loss does not exceed the lower limit.

[0006] Optimize the equipment process flow to integrate ordinary manual welding equipment into the robot workstation for use. Due to the individual differences between the equipment, how to convert the electrode cap grinding amount to the robot becomes a difficult problem. In the past, laser detection was used to detect the actual loss of the electrode cap. The laser detection collected data and transmitted it to the PLC. The PLC converted the value and sent it to the robot. After the robot received the data, it changed the coordinates of the working position point. After a series of calculations and conversions, the robot finally received the loss data. This solution uses laser detection, which has the advantages of stability, accuracy, and efficiency, but it also has the disadvantages of high difficulty in installation and debugging, and high daily maintenance and repair costs. Utility Model Content

[0007] The utility model aims to overcome the shortcomings and deficiencies of the prior art and provide a device for detecting the grinding amount of an electrode cap of a welding device.

[0008] The purpose of the utility model is achieved through the following technical solutions:

[0009] A device for detecting the grinding amount of an electrode cap of a welding device, wherein the welding device comprises a robot and a PLC, an end flange of the robot is provided with an Omron proximity sensor, the Omron proximity sensor faces the electrode cap of the welding device located below and is electrically connected to the PLC; the gripper of the robot is used for the welding device to clamp products to be welded and transfer completed welded products.

[0010] The model of the Omron proximity sensor is E2E-X1C1.

[0011] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0012] 1. In order to replace the laser detection equipment, the utility model adopts the Omron proximity sensor as the detection element of the electrode cap grinding amount of the welding equipment. The detection range of the sensor is 1MM, which meets the electrode cap loss tolerance range and does not affect the robot welding position error range; and the sensor is also very convenient for daily replacement or as a stock spare. The detection device of the utility model has the advantages of low installation and debugging difficulty and low daily maintenance and repair costs.

[0013] 2. The utility model uses the precise characteristics of robot movements to use the robot as an executor, and installs the Omron proximity sensor on the end flange of the robot to reduce the impact of position occupation on the robot's movement trajectory; the loss height is measured by comparing the loss of a new electrode cap and an electrode cap that is close to the limit; the robot detection range is set according to the measured loss height. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the device for detecting the grinding amount of the electrode cap of the welding equipment according to the utility model.

[0015] Figure 2 for Figure 1 A partial enlarged view of the area where the Omron proximity sensor is located.

[0016] The meanings of the reference numerals are as follows:

[0017] 1- nut extension tube, 2- electrode arm, 3- electrode cap, 4- end flange of robot, 5- Omron proximity sensor. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0019] like Figure 1 , 2 , a device for detecting the grinding amount of the electrode cap of the welding equipment, the welding equipment includes a robot and a PLC, the end flange of the robot is provided with an Omron proximity sensor, the Omron proximity sensor is facing the electrode cap of the welding equipment located below, and is electrically connected to the PLC; the gripper of the robot is used for the welding equipment to clamp the product to be welded and transfer the completed welded product.

[0020] The model of the Omron proximity sensor is E2E-X1C1.

[0021] The nut expansion tube 1, the electrode arm 2, and the electrode cap 3 are components of the welding equipment, and their working process is not the focus of this embodiment.

[0022] When the welding equipment is stopped, the electrode cap of the welding equipment is inspected. The working process of the device for inspecting the grinding amount of the electrode cap of the welding equipment is as follows:

[0023] PLC calls the robot measurement program, the robot executes the program and moves to the starting detection position (the Omron proximity sensor 5 installed on the end flange 4 of the robot moves synchronously), and then slowly descends at a uniform speed until the Omron proximity sensor 5 detects the end face of the electrode cap 3, and the Omron proximity sensor 5 sends a signal to the PLC, and the PLC sends the received signal to the robot. The robot records the current position and calculates the detection range height and stores it internally. The robot replaces the original position data with the new data position, thereby obtaining the grinding amount of the electrode cap 3, and the problem of welding position deviation caused by the wear of the electrode cap 3 is solved.

[0024] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A device for detecting the grinding amount of an electrode cap of a welding device, wherein the welding device comprises a robot and a PLC, and is characterized in that: The end flange of the robot is provided with an Omron proximity sensor, which faces the electrode cap of the welding equipment located below and is electrically connected to the PLC; the gripper of the robot is used for the welding equipment to clamp the products to be welded and transfer the completed welded products.

2. The device for detecting the grinding amount of the electrode cap of welding equipment according to claim 1, characterized in that: The model of the Omron proximity sensor is E2E-X1C1.

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