阅读说明：本技术 一种焊枪自动更换电极帽控制方法 (Control method for automatic replacement of electrode cap of welding gun ) 是由 刘明勋 邹显国 温礼彬 于 2018-05-30 设计创作，主要内容包括：本发明涉及一种焊枪自动更换电极帽控制方法,包括以下步骤：S1、采集电极帽的已工作次数、已修磨次数和已修磨量；S2、判断电极帽的已工作次数是否小于第一设定次数,若是,则不修磨焊枪且不更换电极帽,否则进行步骤S3；S3、判断电极帽是否同时满足已修磨次数不大于第二设定次数以及已修磨量不大于设定厚度,若是,则修磨焊枪,但不更换电极帽,否则更换电极帽。与现有技术相比,本发明能自动判断电极帽的修磨和更换情况,节省了人力,最大程度的提高电极帽利用率,有效的降低电极帽的消耗,且保证了白车身的焊接质量。(The invention relates to a control method for automatically replacing an electrode cap of a welding gun, which comprises the following steps: s1, collecting the working times, the coping times and the coping amount of the electrode cap; s2, judging whether the working times of the electrode cap are less than a first set time, if so, not grinding the welding gun and not replacing the electrode cap, otherwise, performing the step S3; and S3, judging whether the number of times of grinding is not more than a second set number of times and the grinding amount is not more than a set thickness, grinding the welding gun if the number of times of grinding is not more than the second set number of times and the grinding amount is not more than the set thickness, and replacing the electrode cap if the number of times of grinding is not more than the second set number of times and the grinding amount is not more than the. Compared with the prior art, the invention can automatically judge the grinding and replacing conditions of the electrode cap, saves labor, improves the utilization rate of the electrode cap to the maximum extent, effectively reduces the consumption of the electrode cap and ensures the welding quality of a white vehicle body.)

1. A control method for automatically replacing an electrode cap of a welding gun is characterized by comprising the following steps:

S1, collecting the working times, the coping times and the coping amount of the electrode cap;

S2, judging whether the working times of the electrode cap are less than a first set time, if so, not grinding the welding gun and not replacing the electrode cap, otherwise, performing the step S3;

And S3, judging whether the number of times of grinding is not more than a second set number of times and the grinding amount is not more than a set thickness, grinding the welding gun if the number of times of grinding is not more than the second set number of times and the grinding amount is not more than the set thickness, and replacing the electrode cap if the number of times of grinding is not more than the second set number of times and the grinding amount is not more than the.

2. The method for controlling the automatic replacement of the electrode cap of the welding gun according to claim 1, wherein the first set number of times is in a range of 150 to 250 times.

3. The automatic electrode cap replacement control method for the welding gun according to claim 2, wherein the first set number of times is 200.

4. the method for controlling the automatic replacement of the electrode cap of the welding gun according to claim 1, wherein the second set number of times is in a range of 10 to 25 times.

5. the method for controlling the automatic replacement of the electrode cap of the welding gun according to claim 1, wherein the set thickness is 3-6 mm.

6. The control method for automatically replacing the electrode cap of the welding gun according to claim 1, wherein the control method is realized by a programmable logic controller.

Technical Field

The invention relates to the field of automobile manufacturing, in particular to a control method for automatically replacing an electrode cap of a welding gun.

Background

In the current automatic welding process of the body in white, when an electrode cap of a welding gun is replaced, batch replacement is mostly carried out by human experience.

At present, the global automobile industry is rapidly developed, the automobile manufacturing industry is developed day by day, the automobile safety is improved to the top level by the automobile manufacturing, and the welding quality of the body-in-white framework has a stricter significance. In the welding process of a white automobile body, a large number of robot spot welding are adopted, the diameter of the end face of the electrode cap is increased after a certain amount of welding spots are welded by a welding gun, and an oxide layer is attached to the head of the electrode cap. Because the electrode is subjected to high temperature in the welding process and has alloy oxidation reaction with a vehicle body sheet metal part, a zinc sublimation phenomenon is generated, namely zinc is displaced from a steel plate and gathered on the surface of the electrode, the process causes the increase of the resistance on the electrode and influences the conductivity of the electrode, and poor welding such as cold joint, explosion welding and the like is generated. In order to ensure the welding quality of a body-in-white, the electrode cap needs to be polished to remove an oxide layer on the surface of the head of the electrode cap, and the shape, the size and the function of the electrode are repaired by a cutting technology. Most of the existing electrode caps are replaced by artificial experience, so that the electrode caps are not utilized to the maximum extent, and the waste of metal resources and the increase of manufacturing cost are caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a control method for automatically replacing an electrode cap of a welding gun.

the purpose of the invention can be realized by the following technical scheme:

A control method for automatically replacing an electrode cap of a welding gun comprises the following steps:

S1, collecting the working times, the coping times and the coping amount of the electrode cap;

S2, judging whether the working times of the electrode cap are less than a first set time, if so, not grinding the welding gun and not replacing the electrode cap, otherwise, performing the step S3;

And S3, judging whether the number of times of grinding is not more than a second set number of times and the grinding amount is not more than a set thickness, grinding the welding gun if the number of times of grinding is not more than the second set number of times and the grinding amount is not more than the set thickness, and replacing the electrode cap if the number of times of grinding is not more than the second set number of times and the grinding amount is not more than the.

Preferably, the first set number of times ranges from 150 to 250 times.

Preferably, the first set number of times is 200 times.

Preferably, the second set number of times ranges from 10 to 25 times.

Preferably, the set thickness is 3-6 mm.

Preferably, the control method is realized by a programmable logic controller.

Compared with the prior art, the invention has the following advantages:

1. the grinding and replacing conditions of the electrode cap can be automatically judged, the labor is saved, the utilization rate of the electrode cap is improved to the maximum extent, the consumption of the electrode cap is effectively reduced, and the welding quality of a white vehicle body is ensured.

2. The acquisition signal is convenient, only need through current robot controller data acquisition, set for the program through programmable logic controller and realize control function, need not newly-increased equipment, convenient to use.

3. The data acquisition and processing process is simple, the response time of the control process is short, and the working reliability is high.

Drawings

FIG. 1 is a flow chart of a method in an embodiment.

Detailed Description

the invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.