阅读说明：本技术 一种焊接温度控制方法 (Welding temperature control method ) 是由 兰江华 于 2019-09-27 设计创作，主要内容包括：本发明提供了一种焊接温度控制方法,包括自动焊接设备,所述自动焊接设备包括焊枪、温控系统和识别系统,所述识别系统识别待焊接件的识别信息,所述温控系统根据所述识别信息调出对应的焊接工艺参数,并基于所述焊接工艺参数自动设定所述焊枪气流量,所述焊接工艺参数包括焊缝的目标温度,还包括管径、壁厚等自动调焊接参数所述温控系统包括温度监测头,用于监测焊缝的实时温度,当所述实时温度与目标温度的差值超过第一阈值时,所述温控系统调节所述焊枪气流量,以使所述实时温度与目标温度的差值小于所述第一阈值。通过识别信息自动调出焊接参数,利于自动化实现,避免人为错误,温度异常自动停机、杜绝批量问题。(The invention provides a welding temperature control method, which comprises automatic welding equipment, wherein the automatic welding equipment comprises a welding gun, a temperature control system and an identification system, the identification system identifies identification information of a part to be welded, the temperature control system calls out corresponding welding process parameters according to the identification information and automatically sets the welding gun airflow based on the welding process parameters, the welding process parameters comprise the target temperature of a welding seam, the temperature control system also comprises a temperature monitoring head for monitoring the real-time temperature of the welding seam, and when the difference value between the real-time temperature and the target temperature exceeds a first threshold value, the temperature control system adjusts the welding gun airflow so that the difference value between the real-time temperature and the target temperature is smaller than the first threshold value. Welding parameters are automatically called out through identification information, automation is facilitated, human errors are avoided, automatic shutdown is achieved due to abnormal temperature, and batch problems are avoided.)

1. A welding temperature control method is characterized by comprising

An automatic welding apparatus (100), the automatic welding apparatus (100) comprising a welding torch (110), a temperature control system (120), and an identification system,

the identification system identifies identification information of a part to be welded (210),

the temperature control system (120) calls out corresponding welding process parameters according to the identification information and automatically sets the gas flow of the welding gun (110) based on the welding process parameters,

the welding process parameter includes a target temperature of the weld,

the temperature control system (120) comprises a temperature monitoring head (121) for monitoring the real-time temperature of the welding seam,

when the difference between the real-time temperature and the target temperature exceeds a first threshold, the temperature control system (120) adjusts the gas flow rate of the welding gun (110) so that the difference between the real-time temperature and the target temperature is smaller than the first threshold.

2. The welding temperature control method of claim 1, further comprising the temperature control system (120) issuing an alarm when the difference between the real-time temperature and the target temperature exceeds a second threshold value and the difference does not decrease after a period of time of the adjusting, wherein the second threshold value is greater than the first threshold value.

3. The welding temperature control method according to claim 2, further comprising, when the difference between the real-time temperature and the target temperature exceeds a third threshold value and the difference is not reduced after a period of time of the adjustment, the temperature control system (120) controlling the automatic welding apparatus (100) to stop and alarm,

wherein the third threshold is greater than the second threshold.

4. Welding temperature control method according to any of claims 1 to 3, characterized in that the temperature monitoring head (121) is an infrared monitoring head.

5. Welding temperature control method according to claim 4, characterized in that the temperature monitoring head (121) is an array of 6-12 infrared monitoring heads.

6. The welding temperature control method according to any one of claims 1 to 3, wherein the first threshold value does not exceed ± 50 ℃.

7. Welding temperature control method according to any of claims 2 to 3, characterized in that said second threshold value does not exceed ± 80 ℃.

8. The welding temperature control method according to claim 3,

the third threshold value does not exceed ± 120 ℃.

9. A test welding process method is characterized by comprising the following steps:

s1: automatically identifying identification information of a to-be-welded part (210);

s2: calling out corresponding welding process parameters according to the identification information,

wherein the welding process parameter comprises a target temperature of the weld;

s3: clamping and adjusting the to-be-welded part (210), and adjusting the height, distance and inclination angle of the welding gun (110);

s4: automatically setting the gas flow of the welding gun (110) according to the welding process parameters;

s5: igniting and trial-welding, monitoring real-time temperatures of two sides of a welding seam, and automatically finely adjusting the gas flow of a welding gun (110) until the difference value between the real-time temperature and the target temperature is smaller than a first threshold value;

s6: and inspecting the quality of the welding line, and performing formal welding when the quality of the welding line meets the requirement.

10. The trial welding process method according to claim 9,

and when the weld quality does not meet the requirement, returning to the step S3 for readjustment.

Technical Field

The invention relates to the technical field of gas welding, in particular to a welding temperature control method.

Background

The two types of heat exchangers of the condenser and the evaporator are used as core components of the air conditioner, and the welding quality of the two types of heat exchangers is directly related to the noise, the stress, the service life and the like of an air conditioning system. The key parameters affecting the welding quality are welding temperature: over-high temperature is easy to cause over-burning, so that pipeline grains are large, cracking refrigerants are leaked and lose efficacy, simultaneously, welding beading is easy to form in the pipeline, and noise complaints such as squeaking sound, liquid flow sound and the like are generated; if the welding temperature is too low, the fusion cannot be conducted, the welding occlusion is poor, the pressure bearing difference of the pipeline is easy to vibrate and crack, and the refrigerant leakage failure is caused.

In the existing automatic welding, welding temperature is checked by a person at regular intervals (such as 2 hours/time), and when abnormality occurs, the flow is controlled by a regulating valve. The defect is that when the temperature is detected to be abnormal, the problems of small batch or large batch are often caused, the repair and scrapping cost is high, the consistency of welding quality is difficult to ensure, and the product quality is seriously influenced.

Disclosure of Invention

In order to solve at least one problem, the invention provides a welding temperature control method.

A welding temperature control method comprises

Automatic welding equipment, which comprises a welding gun, a temperature control system and an identification system,

the identification system identifies the identification information of the parts to be welded, the identification mode can be code scanning, scanning the bodies of the parts to be welded, image identification and the like,

the temperature control system calls out corresponding welding process parameters according to the identification information and automatically sets the flow of the welding gun based on the welding process parameters,

the welding process parameters comprise the target temperature of the welding seam, and also comprise automatic welding parameters such as pipe diameter, wall thickness and the like

The temperature control system comprises a temperature monitoring head for monitoring the real-time temperature of the welding seam,

when the difference value between the real-time temperature and the target temperature exceeds a first threshold value, the temperature control system adjusts the welding gun gas flow so that the difference value between the real-time temperature and the target temperature is smaller than the first threshold value.

Furthermore, the method also comprises the following steps of,

when the difference between the real-time temperature and the target temperature exceeds a second threshold value and the difference does not decrease after a period of time of the adjustment, the temperature control system issues an alarm,

wherein the second threshold is greater than the first threshold.

Furthermore, the method also comprises the following steps of,

when the difference value between the real-time temperature and the target temperature exceeds a third threshold value and the difference value is not reduced after a period of time of adjustment, the temperature control system controls the automatic welding equipment to stop and give an alarm,

wherein the third threshold is greater than the second threshold.

Furthermore, the temperature monitoring head is an infrared monitoring head.

Furthermore, the temperature monitoring heads are 6-12 infrared monitoring head arrays.

Further, the first threshold value does not exceed ± 50 ℃.

Further, the second threshold value does not exceed ± 80 ℃.

Further, the third threshold value does not exceed ± 120 ℃.

Thus, the welding temperature control method of the present invention has at least the following effects:

1. welding parameters are automatically called out through the identification information, so that automation is facilitated, and human errors are avoided;

2. the welding temperature is visual, the whole-process monitoring is automatic, the welding temperature fluctuation range is small (within +/-50 ℃), the welding precision is high, and the consistency is good;

3. the personnel do not need to regularly check and adjust, and the labor is saved and the efficiency is high;

4. the automatic shutdown is stopped when the temperature is abnormal, and the problem of batch production is avoided.

The invention also provides a trial welding process method, which comprises the following steps:

s1: automatically identifying the identification information of the parts to be welded;

s2: calling out corresponding welding process parameters according to the identification information,

wherein the welding process parameter comprises a target temperature of the weld;

s3: clamping and adjusting a to-be-welded part, and adjusting the height, distance and inclination angle of a welding gun pair;

s4: automatically setting the flow of the welding gun according to the welding process parameters;

s5: igniting and welding, monitoring real-time temperatures of two sides of a welding seam, and automatically finely adjusting the gas flow of a welding gun until the difference value between the real-time temperature and the target temperature is smaller than a first threshold value;

s6: and inspecting the quality of the welding line, and performing formal welding when the quality of the welding line meets the requirement.

Further, when the weld quality does not meet the requirement, returning to the step S3 for readjustment.

Therefore, the trial welding process method at least has the following effects:

1. welding parameters are automatically called out through the identification information, so that automation is facilitated, and human errors are avoided;

2. the welding temperature is visual, the whole-process monitoring and automatic adjustment are realized, the welding temperature fluctuation range is small, and the ignition and welding trial efficiency is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic view of an automatic welding apparatus of the present invention;

FIG. 2 is a flow chart of a welding temperature control preparation phase of the present invention;

FIG. 3 is a flow chart of a formal welding phase of welding temperature control according to the present invention;

description of reference numerals:

100-automatic welding equipment, 120-infrared temperature control system, 121-infrared monitoring head array, 110-row welding guns, 111-row welding gun pipeline flow regulator, 112-row welding gun heads, 210-copper pipe elbows and 200-heat exchanger.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

An automatic welding apparatus 100 for use in the present invention is shown in fig. 1 (half shown), the automatic welding apparatus 100 including a plurality of rows of torches 110, a temperature control system 120, and an identification system (not shown), the temperature control system 120 being located at an upper end of the torches 110, the torches 110 having a butt row barrel flow regulator 111 for regulating a flow of gas to the torches 110, and a butt row torch head 112 for performing gas welding. The temperature control system 120 is an eave type extending structure, the far end of the extending direction of the extending structure is provided with a sensor base, the lower end face of the sensor base is provided with an infrared monitoring head array 121 consisting of a plurality of temperature monitoring heads which are arranged in rows and measure downwards, the temperature monitoring heads are preferably 2 to 16 points, and the best is 6 to 12 points. The identification system comprises an identification probe, a data transmission feedback module and a storage processor, wherein the identification probe can be a scanner, a camera or near field communication equipment such as NFC (near field communication), the data transmission feedback module is used for realizing data communication between the identification probe and the storage processor and can be a bus, WIFI (wireless fidelity), Bluetooth and the like, and the storage processor comprises a data storage unit and an operation output unit.

During operation, the information of the copper pipe elbow 210 to be welded, which is identified by the probe, is identified, the identification information is transmitted to the storage processor, the storage processor retrieves corresponding welding process parameters in the data storage unit based on the identification information, the welding process parameters at least comprise parameters such as pipe diameter, wall thickness, welding time and target temperature of a welding seam, the operation output unit calculates target gas flow of the welding gun 110 based on the welding process parameters, the temperature control system 120 sets the welding gas flow based on the target gas flow to carry out welding, and meanwhile, the infrared monitoring head array 121 monitors real-time temperature of the welding seam in real time.

When the difference between the real-time temperature and the target temperature exceeds +/-50 ℃, the temperature control system 120 adjusts the gas flow of the correction welding gun 110 through the welding gun discharge pipeline flow regulator 111 until the welding seam temperature is within +/-50 ℃ of the target temperature.

Particularly, when the real-time temperature monitored by the infrared monitoring system exceeds the range of the target temperature +/-80 ℃ and the difference value between the real-time temperature and the target temperature is not reduced after a period of time of adjustment, the system gives an alarm, but still continues welding production for manual adjustment.

When the infrared monitoring system monitors that the real-time temperature exceeds the range of +/-120 ℃ of the target temperature and the difference value between the real-time temperature and the target temperature is not reduced after a period of time of adjustment, the system is automatically stopped and gives an alarm to wait for manual adjustment and maintenance.

The invention also provides a trial welding process method, which comprises the following steps:

s1: automatically identifying the identification information of the copper pipe elbow 210 to be welded;

s2: calling out corresponding welding process parameters including pipe diameter, wall thickness, welding time, target temperature of a welding seam and the like according to the identification information;

s3: clamping and adjusting the copper pipe elbow 210 to be welded and the heat exchanger 200, and adjusting the height, distance and inclination angle of a welding gun;

s4: automatically setting the flow of the welding gun according to the welding process parameters;

s5: igniting and trial-welding, monitoring real-time temperatures of two sides of a welding seam, and automatically fine-tuning the flow of the air valve until the temperature of the welding seam is within +/-50 ℃ of a target temperature;

s6: checking the quality of the welding line, and performing formal welding when the quality of the welding line meets the requirement; and when the weld quality does not meet the requirement, returning to the step S3 for readjustment.

The invention also provides a formal welding process method, which comprises the following steps:

s7: during formal welding, the infrared monitoring system monitors the temperature of a welding seam in the whole process, and when the temperature exceeds the target temperature by +/-50 ℃, the system automatically corrects the airflow flow of the welding gun at the corresponding point until the target temperature is met;

s8: when the real-time temperature monitored by the infrared monitoring system exceeds the target temperature by +/-80 ℃ and cannot be automatically corrected, the system gives an alarm, but welding production is still continued to be carried out, and manual adjustment is waited.

S9: when the real-time temperature monitored by the infrared monitoring system exceeds the target temperature by +/-120 ℃, and automatic correction cannot be performed, the system is automatically stopped and gives an alarm to wait for manual adjustment and maintenance.

When the system overtemperature can be adjusted and shrunk through the automatic welding gas flow, the system releases the alarm and continues automatic production, so that unnecessary maintenance operation is avoided.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.