CN114769828A

CN114769828A - Welding method, welding device, and storage medium

Info

Publication number: CN114769828A
Application number: CN202210386848.7A
Authority: CN
Inventors: 陈驰
Original assignee: Jiangsu Nst Electronic Science And Technology Co ltd
Current assignee: Jiangsu Nst Electronic Science And Technology Co ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2022-07-22

Abstract

The invention relates to a welding method, a welding device and a storage medium, comprising the following steps: preparing a workpiece; clamping a workpiece; performing primary detection, namely judging whether the detection value of the detection mechanism is within the range of a standard load value, if the detection is qualified, performing welding, and if the detection is unqualified, not performing welding; and secondary detection, namely judging whether the detection value of the detection mechanism is in the standard load value range, if the detection is qualified, judging the workpiece to be a qualified product, and if the detection is unqualified, judging the workpiece to be an unqualified product. The invention can realize the detection of the existence of the workpiece before welding and the normal clamping posture of the workpiece by judging whether the detection value of the detection mechanism is in the range of the standard load value or not, detect the deformation of the workpiece during welding and after welding, avoid the situations of damaging a welding device and damaging the workpiece such as empty welding, wrong welding and the like if the welding operation is abnormally stopped, can assist in the judgment of welding quality, reduce the production loss rate and improve the production efficiency.

Description

Welding method, welding device, and storage medium

Technical Field

The present invention relates to the field of welding detection technologies, and in particular, to a welding method, a welding apparatus, and a storage medium.

Background

In the application of the resistance welding technology, the traditional welding device mainly adopts an up-and-down welding mode, and under special conditions, due to the structural reasons of workpieces (such as automobile electronic products, motor rotors and the like), the up-and-down welding mode cannot be realized, and a mechanism for horizontally clamping and welding is required to meet the welding requirement. However, the conventional horizontal clamping welding apparatus has technical drawbacks as follows:

welding conditions in the resistance welding process can change, including electrode abrasion, product dimension abnormity and manual operation abnormity, and the traditional horizontal clamping welding device cannot monitor, feed back and process the deformation condition of a workpiece, the mechanism change condition, the quality inspection after welding and the like in the welding process of the welding device in real time.

When the dimensional tolerance of the welding part of the workpiece to be welded is large, the workpiece with large pressure and large current can generate large deviation and large internal stress when being welded, and the yield of the product is influenced.

Third, many conventional horizontal clamping welding devices do not have a function of detecting the magnitude and change of welding pressure in real time, or have a pressure detection mechanism, but have a complicated structure, so that the pressure sensor is affected by deformation stress and forces of other parts, cannot be accurately reflected to the pressure sensor, and has a bulky structure and high manufacturing cost.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a welding method, a welding apparatus and a storage medium to solve one or more problems of the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a welding method comprising the steps of:

preparing a workpiece;

clamping a workpiece;

performing primary detection, namely judging whether the detection value of the detection mechanism is within the range of the standard load value, if the detection is qualified, performing welding, and if the detection is unqualified, not performing welding;

and performing secondary detection, namely judging whether the detection value of the detection mechanism is within the standard load value range, if the detection is qualified, judging the workpiece to be a qualified product, and if the detection is unqualified, judging the workpiece to be an unqualified product.

Optionally, after the step of preparing the workpiece and before the step of clamping the workpiece, the method further comprises the steps of: and calibrating the resistance welding mechanism.

Optionally, the step of determining whether the detected value is within the standard load value range by the detection mechanism in the primary detection and the secondary detection includes: and judging whether the displacement detection value of the detection mechanism is within the displacement standard value range.

Optionally, the method further includes an intermediate detection after the primary detection step and before the secondary detection step, and the intermediate detection includes: and judging whether the pressure detection value of the detection mechanism is in the range of the pressure standard value, if the detection is qualified, continuing welding, and if the detection is unqualified, judging that the workpiece 3 is an unqualified product and stopping welding.

The invention also discloses a welding device using the welding method, the welding device comprises a resistance welding mechanism and a displacement mechanism connected with a part of the resistance welding mechanism, the welding device also comprises a detection mechanism, one part of the detection mechanism is arranged on the resistance welding mechanism, and the other part of the detection mechanism is arranged on the displacement mechanism.

Further, the detection mechanism comprises a first detection mechanism, the first detection mechanism is connected with a part of the resistance welding mechanism, and the first detection mechanism is used for detecting the displacement of the resistance welding mechanism in the welding process.

Further, the detection mechanism comprises a second detection mechanism, the second detection mechanism is embedded in the far end of the displacement mechanism, and the second detection mechanism is used for detecting the pressure applied to the workpiece in the welding process.

Furthermore, welding set still includes collector, treater, memory and controller, the collector sets up the input port of treater, the collector is connected with a part of detection mechanism, a part of treater is connected the memory, another part of treater is connected with a part of controller, another part of controller is connected resistance welding mechanism and displacement mechanism respectively.

Further, the welding device further comprises a follow-up mechanism, one part of the follow-up mechanism is connected with one part of the displacement mechanism, and the other part of the follow-up mechanism is connected with the other part of the controller.

The invention also discloses a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the welding method.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention can realize the detection of the existence of a workpiece and the normal clamping posture of the workpiece before welding and the detection of the deformation of the workpiece after welding by judging whether the detection value of the displacement detection mechanism is in the range of a displacement standard value, and can avoid the situations of damaging the welding device and the workpiece such as empty welding, wrong welding and the like if the welding operation is stopped abnormally, thereby assisting the welding quality judgment, reducing the production loss rate and improving the production efficiency.

And if the detected value of the pressure detection mechanism is within the range of the standard pressure value, the workpiece is judged to be normally welded, and meanwhile, the controller adjusts the output force of the second cylinder to increase or decrease so that the pressure value approaches to U, so that over-welding or false welding is avoided, the welding quality judgment can be assisted, the production loss rate is reduced, and the production efficiency is improved.

And thirdly, the invention is simultaneously provided with the displacement detection mechanism and the pressure detection mechanism, and the other detection mechanism can still continue to carry out quality judgment under the condition that any one detection mechanism fails, thereby ensuring the detection accuracy and improving the production efficiency.

And meanwhile, when the dimensional tolerance of the welding part of the workpiece to be welded is large, the follow-up mechanism can generate damping force to absorb part of impact under the condition of large displacement amplitude or large vibration, so that the welding deformation process of the workpiece is more stable, more action processing is avoided for clamping the workpiece, the deviation and internal stress of the workpiece under large pressure are also avoided, and the production yield is improved.

According to the invention, the pressure detection mechanism is embedded into the far end of the sliding block, when a workpiece is pressed and welded, the second output end of the second air cylinder is contacted with the pressure detection mechanism to provide pressure, the fixing mode of two ends of the traditional pressure sensor and the fixing mode of screws are replaced, the influence of stress and irrelevant external force is avoided, and the measuring accuracy of the sensor is ensured and the service life is prolonged.

Drawings

Fig. 1 is a schematic front view of a welding apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic top view of a welding apparatus according to an embodiment of the present invention.

Fig. 3 is a schematic side view of a welding device according to an embodiment of the present invention.

Fig. 4 shows an isometric view of a welding apparatus provided in accordance with an embodiment of the present invention.

Fig. 5 is a schematic connection diagram of a welding device according to an embodiment of the present invention.

Fig. 6 shows a flowchart of a control method according to an embodiment of the present invention.

Fig. 7 is a waveform diagram of a first detection mechanism in a welding device according to an embodiment of the present invention during welding.

In the drawings, the reference numbers:

1. a resistance welding mechanism; 101. a positive output end; 102. a first conductive seat; 103. a first conductive block; 104. A first compact block; 105. a first electrode; 106. a negative output end; 107. a second conductive seat; 108. a second conductive block; 109. a second compact block; 110. a second electrode; 111. a soft copper strip; 2. a displacement mechanism; 201. A slide rail; 202. a slider; 203. a second cylinder; 2031. a second output terminal; 204. an adjustment mechanism; 3. A workpiece; 4. a detection mechanism; 401. a first detection mechanism; 4011. a third output terminal; 4012. a gear lever; 402. A second detection mechanism; 5. a follow-up mechanism; 501. a swing structure; 502. a first cylinder; 5021. a first output terminal; 601. a collector; 6011. a first ADC interface; 6012. a second ADC interface; 602. a processor; 6021. an RS485 interface; 6022. an SPI interface; 603. a memory; 604. a controller; 605. a display unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

In the description of the present invention, it is intended that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like be defined in the referenced orientation or positional relationship as shown in the drawings for ease of description and simplicity of description, but not to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

In the description of the present application, it is to 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; they may be mechanically coupled, electrically coupled, or in communication with each other, directly coupled, or indirectly coupled through intervening media, in which case they may be interconnected, or in which case they may be in an interconnecting relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In order to describe the structure of the welding apparatus more clearly, the present invention defines the terms "distal end" and "proximal end", specifically, the "distal end" indicates the end away from the workpiece 3 during welding, and the "proximal end" indicates the end close to the workpiece 3 during welding, taking fig. 1 as an example, the right side of the displacement mechanism 2 in fig. 1 is the distal end, and the left side of the displacement mechanism 2 in fig. 1 is the proximal end.

Example one

The welding device provided by the invention comprises a resistance welding mechanism 1 and a displacement mechanism 2 movably connected with a part of the resistance welding mechanism 1, and further comprises a detection mechanism 4, wherein one part of the detection mechanism 4 is arranged on the resistance welding mechanism 1, the other part of the detection mechanism 4 is arranged on the displacement mechanism 2, and the detection mechanism 4 is used for detecting the load state of a workpiece 3 during welding.

Referring to fig. 1 and 5, the specific structures of the resistance welding mechanism 1 and the displacement mechanism 2 are first described below:

the resistance welding mechanism 1 comprises an anode output end 101 and a cathode output end 106, wherein the anode output end 101 is connected with a first conductive seat 102, a first conductive block 103 is arranged at the front end of the first conductive seat 102, and a first pressing block 104 is arranged at the front end of the first conductive block 103 and used for fixing a first electrode 105; the negative output end 106 is connected with a second conductive seat 107, a second conductive block 108 is arranged at the front end of the second conductive seat 107, and a second pressing block 109 is arranged at the front end of the second conductive block 108 and used for fixing a second electrode 110. Preferably, in the first embodiment of the present invention, the positive output terminal 101 is connected to the first conductive socket 102 through a soft copper strip 111, and the negative output terminal 106 is connected to the second conductive socket 107 through the soft copper strip 111, and the soft copper strip 111 has the advantages of strong conductivity, large current capacity, small resistance value, and durability.

The displacement mechanism 2 comprises a slide rail 201, a slide block 202 movably mounted on the slide rail 201, and a second air cylinder 203 connected with the right end of the slide rail 201, wherein a second output end 2031 of the second air cylinder 203 can stretch and push the slide block 202, and the second air cylinder 203 can be adjusted or replaced according to actual construction requirements, so that the output force of the second air cylinder 203 can be changed. One end of the slider 202 is connected to the second conductive seat 107, the second conductive seat 107 can move horizontally along the slide rail 201 together with the slider 202, the left end of the slide rail 201 is connected to the first conductive seat 102, and the first conductive seat 102 can adjust the position of the first conductive seat 102 on the slide rail 201 through an adjusting mechanism 204 arranged at the left end of the slide rail 201. The adjusting mechanism 204 is preferably a screw adjusting structure, and when the first conductive socket 102 is adjusted in place, the first conductive socket 102 may be fixed on the sliding rail 201, and the adjusting mechanism 204 may also be other structures, such as a multi-stage snap structure and a double-nut fixing structure, as long as it can adjust and fix the position of the first conductive socket 102 on the sliding rail 201.

With continuing reference to fig. 1, 4 and 5, the following describes a specific structure of the detecting mechanism 4 as follows:

further, the detection mechanism 4 includes a first detection mechanism 401 and a second detection mechanism 402, the first detection mechanism 401 is used for detecting the displacement of the electric resistance welding mechanism 1 in the welding process, and the second detection mechanism 402 is used for detecting the pressure to which the workpiece 3 is subjected in the welding process.

Preferably, in the welding apparatus according to the first embodiment, the first detecting mechanism 401 employs a rod displacement detecting mechanism, the third output port 4011 of the first detecting mechanism 401 is disposed at the upper end of the first conductive socket 102, and the stopper 4012 of the first detecting mechanism 401 is disposed at the upper end of the second conductive socket 107 corresponding to the third output port 4011. In another embodiment of the present invention, the first detection mechanism 401 may be a laser displacement sensor or the like, as long as it can detect the displacement of the resistance welding mechanism 1 during the welding process, and the present invention is not limited thereto.

With continued reference to fig. 1 and 2, further, the second detecting mechanism 402 is embedded at the distal end of the displacement mechanism 2. Preferably, in the welding apparatus according to the first embodiment, the second detection mechanism 402 is embedded in the right end of the slider 202, and when the workpiece 3 is welded, the second output end 2031 of the second cylinder 203 contacts with the second detection mechanism 402 to provide pressure, so as to replace the two-end fixing mode of the conventional pressure sensor, thereby avoiding the influence of stress and irrelevant external force while ensuring the measurement accuracy of the sensor, and prolonging the service life. In other embodiments of the present invention, the second detecting mechanism 402 may be a piezoelectric pressure sensor, a hydraulic pressure sensor, etc., as long as it can detect the pressure applied to the workpiece 3 during the welding process, and the present invention is not limited thereto.

It should be particularly noted that, in the prior art, the pressure sensor applied to the technical field of resistance welding is usually locked by screws at two ends, and this fixing manner is characterized in that the sensitivity of the pressure sensor is reduced due to the deviation of the sizes of the screws and the deviation of the fixing positions, especially, the use conditions are all larger pressure of more than 50Kg, and the sensor generates larger stress at a slight deviation distance under this pressure, which is specifically expressed as pressure value feedback delay, drift and numerical value linearity difference, and the pressure sensor for bearing smaller pressure is supported by a spring buffer, so that the service life is longer. Therefore, the arrangement mode of the pressure sensor is more suitable for being used under the condition of higher pressure.

With continuing reference to fig. 1 to 4, further, the welding device further includes a following mechanism 5, a portion of the following mechanism 5 is connected to a portion of the displacement mechanism 2, and another portion of the following mechanism 5 is connected to another portion of the controller 604.

Specifically, in the welding device according to the first embodiment, the following mechanism 5 includes a swing structure 501 connected to the rear end of the slider 202 and a first cylinder 502 connected to the swing structure 501, an output force of the first cylinder 502 is smaller than an output force of the second cylinder 203, when the workpiece 3 needs to be clamped, the following mechanism 5 is started, the first output end 5021 of the first cylinder 502 pushes the swing structure 501 with a smaller output force, the swing structure 501 drives the slider 202 to make the second electrode 110 tightly contact with the workpiece 3, clamping of the first electrode 105 and the second electrode 110 on the workpiece 3 is completed, the first output end 5021 of the first cylinder 502 continuously provides a smaller output force during welding to make the second electrode 110 tightly contact with the workpiece 3 at any moment, and when the welding deformation amount of the workpiece 3 is large, the following mechanism 5 can generate a damping force to absorb a part of the impact under the condition of a large displacement or large vibration, the welding deformation process of the workpiece 3 is more stable, more action processing for clamping the workpiece 3 is avoided, and the large-size workpiece 3 is prevented from generating deviation and larger internal stress under larger pressure. The swing structure 501 may be a spring structure or a hydraulic structure, and it is only required to generate a damping force when the damping force is applied, and the present invention is not limited further.

Referring to fig. 5, further, the welding apparatus further includes a collector 601, a processor 602, a memory 603, and a controller 604, the collector 601 is disposed at an input port of the processor 602, the collector 601 is connected to a portion of the detecting mechanism 4, a portion of the processor 602 is connected to the memory 603, another portion of the processor 602 is connected to a portion of the controller 604, and another portion of the controller 604 is connected to the resistance welding mechanism 1 and the displacement mechanism 2, respectively.

Specifically, the collector 601 is an ADC interface disposed in the processor 602, and is configured to input the detection value of the detection mechanism 4 to the processor 602, the collector 601 includes a first ADC interface 6011 and a second ADC interface 6012, the first ADC interface 6011 is connected to the first detection mechanism 401, the second ADC interface 6012 is connected to the second detection mechanism 402, the memory 603 is configured to store a computer program and data, the processor 602 is configured to call the computer program corresponding to the welding method and store and call data corresponding to the detection value of the detection mechanism 4, so that when the computer program is executed by the processor 602, the judgment whether the detection value of the detection mechanism 4 is within a standard load value range and an instruction is sent to the controller 604 according to a judgment result, the controller 604 is configured to receive the instruction sent by the processor 602 and operate the electric resistance welding mechanism 1 to be powered on or powered off, and the movement of the operating displacement mechanism 2 and the follower mechanism 5.

Preferably, in the welding apparatus according to the first embodiment, the processor 602 is a processor with a Cortex M3 core, and the memory 603 is an ARM memory chip; the processor 602 comprises at least one RS485 interface 6021, and the controller 604 may be connected to the RS485 interface 6021, the resistance welding mechanism 1, the displacement mechanism 2, and the following mechanism 5 by using an AD7810 and other digital-to-analog conversion chip, so as to receive the instruction sent by the processor 602 and control the welding current value of the resistance welding mechanism 1, and control the displacement mechanism 2 and the following mechanism 5 to move;

further, the welding device further comprises a display unit 605, an SPI interface 6022 is arranged on the processor 602, and the display unit 605 is connected with the SPI interface 6022 and is used for displaying the detection value, issuing a control instruction to the processor 602 through a selectable graphical interface, and executing a corresponding instruction through the processor 602. Preferably, in the welding device of the first embodiment, the display unit 605 is an LCD display screen, the LCD display screen feeds back the displacement value fed back by the first detection mechanism 401 and the pressure value fed back by the second detection mechanism 402 in real time, and the LCD display screen may also feed back the displacement value and the pressure value in real time and issue a control command through a selectable graphical interface.

The invention also discloses a welding method, please refer to fig. 6, and the following flow specifically describes the welding method as follows:

in step S1, a workpiece 3 is prepared.

Specifically, the workpiece 3 is placed between the first electrode 105 and the second electrode 110, and the welding apparatus is started.

In step S2, the resistance welding mechanism 1 is calibrated.

Specifically, when the first electrode 105 and the second electrode 110 are in the no-material clamping state and are used as displacement zero points, the displacement value measured by the first detection mechanism 401 is 0.

In step S3, the workpiece 3 is clamped.

Specifically, the follower mechanism 5 is opened, the second electrode 110 is brought into close contact with the workpiece 3, the first electrode 105 is fixed, and the workpiece 3 is clamped between the second electrode 110 and the first electrode 105.

Step S4, performing a first detection, determining whether the detection value of the first detection mechanism 401 is within the first displacement standard value range, performing welding if the detection is qualified, and not performing welding if the detection is not qualified.

Specifically, in the welding apparatus according to the first embodiment, the reference load value includes a displacement reference value and a pressure reference value, which are obtained by integrating the displacement detection value S fed back by the first detection mechanism 401 and the pressure detection value U fed back by the second detection mechanism 402 during each successful welding process stored in the memory 603, and the range S + - [ delta ] S of the displacement reference value and the range U + - [ delta ] U of the pressure reference value are formed according to the fluctuation range of these detection values and the deformation rule of the workpiece 3 due to thermal expansion and cold contraction, and the range U + - [ delta ] U of the pressure reference value is formed, and the Δ U is usually less than 2% of the U value. In addition, the fluctuation range of the standard displacement value and the fluctuation range of the standard pressure value can also be obtained by clamping and electrifying only one workpiece 3 and measuring the variation of the workpiece 3 caused by thermal expansion and cold contraction.

Further, referring to fig. 7, the first displacement standard value range is S1 ±. Δ S1, where S1 is ideally a predetermined relative displacement distance between the first electrode 105 and the second electrode 110 in the normal clamping state before welding the workpiece 3, and Δ S1 is an allowable error in the normal clamping state before welding the workpiece 3, the allowable error being derived from an allowable error in manufacturing the workpiece 3 and a slight deviation in placing the workpiece 3. The step is used for judging whether the workpiece 3 exists or not and whether the clamping posture of the workpiece 3 is normal or not, if the clamping posture is within the range of the first displacement standard value, the processor 602 judges that the clamping posture of the workpiece 3 is normal, and sends an instruction to the controller 604 for welding; if the displacement is not within the first displacement standard value range, the processor 602 judges that the workpiece 3 is clamped abnormally, does not perform welding, and manually checks the fault reason after shutdown, wherein the reasons include the following reasons: (1) the workpiece 3 is not placed; (2) the workpiece 3 has a large dimensional error; (3) the first detection mechanism 401 is malfunctioning.

Step S5, welding;

specifically, a pressure value and a current value required for welding are input on a graphical interface of the display unit 605, the display unit 605 issues a control instruction to the processor 602, the processor 602 sends a corresponding control instruction to the controller 604 after corresponding processing, and the controller 604 controls the first cylinder 502 of the follow-up mechanism 5 and the second cylinder 203 of the displacement mechanism 2 to output stable pressure values and controls the positive output end 101 and the negative output end 106 of the resistance welding mechanism 1 to output stable current values to weld the workpiece 3.

Step S6, the intermediate detection is performed to determine whether the detection value of the second detection means 402 is within the range of the standard pressure value, and if the detection is acceptable, the welding is continued, and if the detection is not acceptable, the workpiece 3 is determined to be an unacceptable product and the welding is terminated.

Specifically, the standard pressure value range is U +/- [ delta ] U, wherein U is a pressure value required to be preset according to actual resistance welding of the workpiece 3, and delta U is an allowable error in a normal welding process of the workpiece 3, and the error mainly comes from pressure generated by displacement caused by thermal expansion and cold contraction when the workpiece 3 is electrified and pressure welded. If the pressure value is within the standard pressure value range, the processor 602 determines that the workpiece 3 is welded normally, and preferably, the processor 602 sends a command to enable the controller 604 to adjust the output force of the second cylinder 203 of the displacement mechanism 2 to increase or decrease so that the pressure value detected by the second detection mechanism 402 approaches to U, so as to avoid over-welding or cold-welding; if the welding position is not within the range of the standard pressure value, the processor 602 judges that the workpiece 3 is abnormal in welding and needs to be stopped to check the abnormal reason, and the reasons include the following: (1) the workpiece 3 is offset in position during the welding process; (2) the second detection mechanism 402 fails.

In step S7, secondary detection is performed to determine whether the detection value of the first detection mechanism 401 is within the second displacement standard value range, and if the detection value is qualified, the workpiece 3 is determined to be a qualified product, and if the detection value is unqualified, the workpiece 3 is determined to be an unqualified product.

With reference to fig. 7, specifically, the second displacement standard value range is S2 ±. Δ S2, where S2 is a predetermined relative displacement distance between the first electrode 105 and the second electrode 110 in the normal clamping state after welding the workpiece 3 under ideal conditions, and Δ S2 is an error allowed in the normal clamping state after welding the workpiece 3, and the error mainly comes from displacement caused by thermal expansion and contraction during pressure welding when the workpiece 3 is energized. The step is used for judging whether the welding of the workpiece 3 is normal, if the welding is within the second displacement standard value range, the processor 602 judges that the workpiece 3 is a qualified product, and if the welding is not within the second displacement standard value range, the processor 602 judges that the workpiece 3 is an unqualified product, and the shutdown for checking the abnormal reason is required, and the reasons include the following: (1) the workpiece 3 is shifted in position during the welding process; (2) the first detection mechanism 401 is malfunctioning. This step may also obtain a second displacement measurement — a first displacement measurement of the welding deformation S3 of the workpiece 3 to determine whether the penetration of the workpiece 3 meets the industry standard, typically 8% of the thickness of the workpiece 3.

The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by the processor 602, implements the aforementioned welding method.

The readable storage media of embodiments of the invention may take any combination of one or more computer-readable media. The readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this context, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The welding method is characterized by comprising the following steps:

preparing a workpiece;

clamping a workpiece;

and secondary detection, namely judging whether the detection value of the detection mechanism is in the standard load value range, if the detection is qualified, judging the workpiece to be a qualified product, and if the detection is unqualified, judging the workpiece to be an unqualified product.

2. The welding method of claim 1, further comprising, after the step of preparing the workpiece and before the step of clamping the workpiece, the steps of: the resistance welding mechanism is calibrated.

3. The welding method according to claim 1, wherein the step of determining whether the detection value is within the standard load value range by the detection means in the primary detection and the secondary detection includes: and judging whether the displacement detection value of the detection mechanism is within the displacement standard value range.

4. The welding method of claim 1, wherein: after the primary detection step and before the secondary detection step, the method further comprises intermediate detection, wherein the intermediate detection comprises the following steps: and judging whether the pressure detection value of the detection mechanism is within the range of the pressure standard value, if the pressure detection value is qualified, continuing welding, and if the pressure detection value is unqualified, judging that the workpiece is an unqualified product and terminating welding.

5. A welding apparatus using the welding method according to any one of claims 1 to 4, characterized in that: welding set include resistance weld the mechanism and with the displacement mechanism that resistance weld a part of mechanism and be connected, welding set still includes detection mechanism, some of detection mechanism set up in resistance weld the mechanism, another part of detection mechanism set up in displacement mechanism.

6. The welding device of claim 5, wherein: the detection mechanism comprises a first detection mechanism, the first detection mechanism is connected with a part of the resistance welding mechanism, and the first detection mechanism is used for detecting the displacement of the resistance welding mechanism in the welding process.

7. The welding device of claim 5, wherein: the detection mechanism comprises a second detection mechanism, the second detection mechanism is embedded into the far end of the displacement mechanism, and the second detection mechanism is used for detecting the pressure applied to the workpiece in the welding process.

8. The welding device of claim 5, wherein: welding set still includes collector, treater, memory and controller, the collector sets up the input port of treater, the collector with detection mechanism's partly is connected, partly the connection of treater the memory, another part of treater with partly the connection of controller, another part of controller is connected respectively resistance welds the mechanism and displacement mechanism.

9. The welding device of claim 8, wherein: the welding device further comprises a follow-up mechanism, one part of the follow-up mechanism is connected with one part of the displacement mechanism, and the other part of the follow-up mechanism is connected with the other part of the controller.

10. A computer-readable storage medium having a computer program stored therein, characterized in that: the computer program, when executed by a processor, implements the welding method of any of claims 1 to 4.