CN115980092A

CN115980092A - Weld piece check out test set

Info

Publication number: CN115980092A
Application number: CN202310267201.7A
Authority: CN
Inventors: 陈昌龙; 孙财; 高翔; 金伟伟; 李龙智; 朱军启; 管新秋; 王洋; 王芳
Original assignee: Ningbo Jining Auto Parts Co ltd
Current assignee: Ningbo Jining Auto Parts Co ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-04-18
Anticipated expiration: 2043-03-20
Also published as: CN115980092B

Abstract

The application discloses a welding check out test set, including last box body and lower box body, lower box body is suitable for and installs on the base face, go up the top that the box body can set up box body under with opening and shutting, the inner wall of going up the box body and box body down is defined with one jointly and is held the chamber, it is provided with determine module along fore-and-aft direction movably to hold the intracavity, determine module is last to be provided with detecting element and test mark unit along left right direction movably, it is suitable for arranging in and holds the intracavity to wait to detect the welding, welding seam and mark line have on the welding, welding seam and mark line all set up, and the central point of welding seam puts and mark line along the distance D1 of left right direction unchangeable, and control determining element and test mark unit and welding seam and mark line position correspond, and along the distance D2= D1 of left right direction. One objective of the present application is to develop a welding part detection device which has low manufacturing cost and high detection quality and is suitable for detecting welding seams with different slopes.

Description

Weld piece check out test set

Technical Field

The application relates to a welding detection field, in particular to a welding detection device.

Background

At present, weld joint detection for welding parts generally has two modes: the method comprises the following steps of X-ray flaw detection and visual detection, wherein the X-ray flaw detection is mainly used for detecting the welding quality inside a welding seam, is mainly used for improving the connection strength of the welding seam, and is generally used for tank bodies; visual detection is mainly used for detecting the welding quality outside the welding seam, is mainly used for improving the attractiveness of the welding seam, is mainly used for detecting obvious cracks, pores, undercut, camber or excessive weld reinforcement, and is generally used for monitoring the quality outside the welding seam through visual detection in the application of automobile sheet metal parts.

But to the flat plate welding technique of present a large amount of uses, because the welding seam quantity increases, the trend of single welding seam is different and the appearance of long welding seam, the visual detection work load that needs to carry out increases sharply, and the automation equipment that is urgently needed replaces the manual work and carries out visual detection, when promoting product quality, shortens the time that detects the needs to satisfy the needs of new technology production. However, the existing automatic weld part detection equipment is high in manufacturing cost and poor in use stability, is difficult to detect weld joints with different slopes, frequently has the phenomena of missing detection, wrong detection and the like, and needs to be solved by technical personnel in the field urgently.

Disclosure of Invention

One objective of the present application is to develop a welding part detection device which has low manufacturing cost and high detection quality and is suitable for detecting welding seams with different slopes.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows:

a welding part detection device comprises an upper box body and a lower box body, wherein the lower box body is suitable for being installed on a base surface, the upper box body is arranged above the lower box body in an openable mode, an accommodating cavity is defined by the inner walls of the upper box body and the lower box body together, a detection assembly is movably arranged in the accommodating cavity along the front-rear direction, a detection unit and a mark checking unit are movably arranged on the detection assembly along the left-right direction, a welding part to be detected is suitable for being placed in the accommodating cavity, a welding line and a mark line are arranged on the welding part, the welding line and the mark line are both arranged upwards, the distance D1 between the center position of the welding line and the mark line along the left-right direction is unchanged, the detection unit, the mark checking unit and the welding line are controlled to correspond to the directions of the mark line, and the distance D2= D1 along the left-right direction is controlled;

when the marking inspection process is carried out, the detection assembly is controlled to move along the front-back direction, so that the detection unit is located at the initial detection position in the front-back direction, then the marking inspection unit is suitable for moving left or right directions with the detection unit, the trend and the position of the welding line are located through the marking line, the detection unit is located at the initial detection position in the left-right direction, the detection unit, the marking inspection unit and the welding line are controlled to correspond to the marking line in position, and the distance D2= D1 in the left-right direction is obtained; when the inspection process is carried out, the detection unit is suitable for moving according to the trend and the position of the welding line positioned by the inspection unit, and detecting the external welding quality of the welding line.

At present, the automobile sheet metal part mostly uses a flat plate welding technology, flat plates with different strengths, toughness and shapes are welded together, and a proper shape is formed by stamping through stamping forming equipment, so that the automobile sheet metal part has the advantages of good appearance precision, good forming quality, cost saving and the like. However, most of the welding seams formed by the flat plate tailor welding are oblique welding seams (namely, the welding seams have a certain slope, and generally, the slopes of all the welding seams are positive values), the conventional automatic detection equipment cannot well meet the effect of detecting the oblique welding seams, and the existing welding part detection equipment also has the problems that the detection is easy to make mistakes and the like.

The inventor further studies and discovers, because present welding seam visual inspection equipment usually adopts machine vision's mode to detect, will wait to detect the welding seam and the inside required welding seam photo of keeping of treater contrast, thereby whether discernment welding seam satisfies visual inspection requirement, but to the bias weld that dull and stereotyped tailor-welding formed, the bias weld that will shoot according to different bias weld slopes earlier becomes straight weld, wherein it is very difficult to utilize the treater to extract the slope of different bias welds, the AI system that needs to possess a large amount of training volume just can accurately extract the slope of different bias welds, this manufacturing cost who has increased this welding spare check out test set, be unfavorable for mill development this type of equipment, and utilize AI discernment still to have the steady difference, the scheduling problem of makeing mistakes easily, be unfavorable for mill continuous use.

In addition, the detection is carried out by utilizing a machine vision mode, the precision requirement on the picture shot by the detection unit is higher, especially for online detection equipment, most welding part detection equipment is supported by sectional materials at present, the welding part detection equipment is easy to deform in use and limited by cost, and a machine body cannot be manufactured by adopting a casting, so that the rigidity of the machine body of the detection equipment is improved, the machine body shakes greatly in the use process, the picture shot by the online detection equipment is easy to blur and misplace, and the unstable detection condition is further caused.

It is worth mentioning that the existing commonly-used visual inspection equipment for the welding seam usually needs to move the detection unit along the direction of the welding seam, and the trend of the welding seam needs to be further analyzed while the quality of the welding seam is detected, so that the calculated amount is large, the calculated amount of a processing chip is increased, the manufacturing cost is further increased, the frequent identification is inaccurate, the missing inspection, the false inspection and other alarms occur, and the speed of the manual visual inspection can not be achieved seriously or even.

In addition, for a welding part formed by welding a plurality of flat plates, after entering a welding part detection device, welding seams with different slopes need to be continuously detected, although the starting positions of the welding seams are basically the same in the front-back direction, the welding seams have different slopes, and it is also difficult to determine the specific position coordinates of the different welding seams in the left-right direction, so that the calculation amount is difficult to complete through a common machine vision identification technology, and the use requirement of a factory cannot be met.

Based on this, the inventor of this application has developed this kind of welding spare check out test set, and the detection subassembly that sets up in it includes detecting element and verification unit, and wherein verification unit is used for tracking and analysis mark line's trend and position, and because it is difficult to directly use machine vision recognition device direct identification welding seam, can produce a mark line that is completely parallel with the welding seam beside the welding seam that awaits measuring to the distance is D1 between the two all the time. The method for generating the marking line can be formed by slightly contacting the surface of the welding part by utilizing a sharp marking tool, and the marking tool can also be directly bound beside a laser welding head for laser welding, and meanwhile, the marking line is generated. In addition, the detection unit and the mark checking unit both comprise cameras for extracting images, and the quality of the welding seam and the trend of the marking line are detected by using a visual recognition algorithm, and the detection algorithm of the welding seam quality, the algorithm for recognizing the marking line and the slope thereof are the prior art and are not repeated. Because the marking line is easier to pass through a machine vision recognition algorithm relative to the welding seam, the noise generated by the marking line is small, the slope and the position of the marking line are easy to recognize through the marking line, and the position of the center of the welding seam is easy to back out because the positions of the marking line and the center of the welding seam are always D1.

Controlling the detection unit and the marking unit and the welding line to correspond to the position of the marking line, wherein the position corresponds to that if the marking line is positioned on the left side of the welding line, the marking unit is also positioned on the left side of the detection unit; similarly, if the marking line is located on the right side of the weld, the marking unit is also located on the right side of the detection unit. The upper box body can be arranged above the lower box body in an opening and closing manner, and has two benefits: one is that the rigidity of the whole machine body can be increased when the detection equipment runs, and compared with the traditional machine body constructed by sectional materials, the machine body has stronger stability, smaller deformation and smaller shake during running, and can be designed in an open-close manner to be convenient to install and maintain; and secondly, other limiting parts are conveniently additionally arranged and used for limiting the displacement of the welding part placed in the accommodating cavity.

When the marking process is carried out, the detection assembly is controlled to move along the front-back direction, so that the detection unit is located at the initial detection position in the front-back direction (namely the Y-axis coordinate of the starting point of the welding seam is the same as the Y-axis coordinate of the position of the detection unit at the time), then the marking unit is suitable for moving in the left or right direction synchronously with the detection unit, the left or right movement depends on the marking line being located at the left or right side of the marking unit at the time, in the moving process, the marking unit passes over the marking line, the slope of the marking line is calculated through a visual identification algorithm, the X-axis coordinate of the starting point of the welding seam is determined, so that the detection unit is located at the initial detection position in the left-right direction (namely the X-axis coordinate of the starting point of the welding seam is the same as the X-axis coordinate of the position of the detection unit at the time), and at the moment, the detection unit completely captures the position of the starting point of the welding seam, so that the next detection process can be carried out. In the inspection process, the movement of the detection unit is formed by the displacement of the detection unit per se along the left-right direction and the displacement of the detection assembly along the front-back direction in a composite mode, so that the movement with a certain slope can be formed, the detection unit is always located above a welding line, and the rapid online detection is realized.

It is worth mentioning that, in the in-service use process, because the welding seam that has many different slopes on the same welding piece, after a welding seam inspection is accomplished, determine module can get into the mark process again, and when controlling determine module and move along the fore-and-aft direction, the mark unit that tests this moment is not in operating condition, at this in-process, can utilize advancing device to impel welding piece, make the welding seam that has detected leave the detection zone, and make the welding seam that detects get into the detection zone, after the welding seam that detects gets into the detection zone completely, can make mark unit and determine unit move to the walking or right side in step, and make mark unit be in operating condition, get slope and position with the discernment mark line.

Compared with the traditional welding part detection equipment, the detection equipment disclosed by the invention has the following advantages: (1) The upper box body and the lower box body which can be opened and closed are utilized, so that the integrity of the detection equipment is improved, the rigidity of the whole detection equipment is effectively improved, and the deformation and the shaking phenomenon in operation are reduced; (2) Reduce the training volume of AI model, do not need the different welding seams of the accurate discernment of training model, only need the discernment mark line, can fix a position the slope of welding seam position and welding seam, manufacturing cost is lower, more effectual detection of the welding seam that satisfies different slopes, and in the on-line measuring process, because the corresponding speed that needs is very fast, the algorithm functioning speed of discernment mark line is faster, response speed is also faster, and because the operand that needs to use is less, the processing cost of chip also gives up, can use comparatively ripe low end chip, further reduce manufacturing cost.

Preferably, the detection assembly comprises a detection shell, a first movable groove and a second movable groove are respectively arranged in the detection shell along the left and right directions, notches of the first movable groove and the second movable groove are both arranged downwards, the first movable groove and the second movable groove are sequentially arranged along the front and back directions, the detection unit and the label checking unit are respectively arranged in the first movable groove and the second movable groove, and the detection unit and the label checking unit are arranged in the left and right directions in a staggered manner and are suitable for respectively moving in the first movable groove and the second movable groove along the left and right directions; the weldment detecting apparatus further comprises a first driving source and a second driving source, wherein the first driving source is suitable for driving the detecting assembly to move in the front-back direction, the second driving source is provided with two driving sources, and the two driving sources are suitable for respectively driving the detecting unit and the marking unit to move in the left-right direction;

when the mark checking process is carried out, the first driving source controls the detection assembly to move along the front-back direction, the detection unit is enabled to be at the initial detection position of the front-back direction, then the second driving source drives the mark checking unit and the detection unit to move, the trend and the position of the welding line are positioned through the marking line, and meanwhile, the distance D2= D1 between the mark checking unit and the detection unit is controlled, and the detection unit is enabled to be at the initial detection position of the left-right direction; when the detection process is carried out, the detection unit is suitable for moving according to the trend and the position of the welding seam positioned by the calibration unit under the driving of the first driving source and the second driving source, the external welding quality of the welding seam is detected, and the detection unit and the calibration unit synchronously move.

Further preferably, the second driving source comprises a detection driving source and a marking driving source, the detection driving source and the marking driving source are suitable for driving the detection unit and the marking unit to move along the left and right directions respectively through a ball screw structure, an angular displacement sensor is mounted on the marking driving source, and the angular displacement sensor is suitable for detecting the angular displacement of the marking driving source in rotation;

when the mark checking process is carried out, the first driving source controls the detection unit to move along the front-back direction, the detection unit is enabled to be at the initial detection position of the front-back direction, then the detection driving source and the mark checking driving source drive the detection unit and the mark checking unit to move until the mark checking unit is enabled to be at the zero position of the left-right direction, and meanwhile, the trend and the position of the welding line are preliminarily positioned according to the angular displacement alpha recorded by the angular displacement sensor and the trend of the marking line recorded by the mark checking unit when the mark checking unit passes through the marking line for the first time; and then the detection driving source and the calibration driving source respectively drive the detection unit and the calibration unit to synchronously and reversely move, and the position of the welding seam is accurately positioned according to the angular displacement alpha and the calibration unit, so that the detection unit is positioned at the initial detection position in the left-right direction.

Preferably, the left side and the right side of the detection assembly are respectively provided with a power transmission assembly and a counterweight assembly, the power transmission assembly is provided with the detection driving source, the detection driving source is in closed-loop control, the power transmission assembly has two working states, namely a transmission state and a blocking state, and when the power transmission assembly is in the transmission state, the power output by the detection driving source is suitable for being output through the power transmission assembly, so that the detection unit and the calibration unit are driven to move simultaneously; when the device is in a blocking state, the power output by the detection driving source can only drive the detection unit to move; the installation on the counter weight component the mark driver source of testing, it is open loop control to test the mark driver source, it is suitable for the individual drive to test the mark driver source the unit motion of left right direction is tested to the mark unit, the counter weight component is suitable for the balance the gravity of power transmission subassembly makes the detection component's focus is in the middle part.

Further preferably, the detection unit includes a detection screw shaft, a detection head and a detection nut, the detection screw shaft and the detection nut form a ball screw structure, the detection nut is slidably connected with the first movable groove in the left-right direction, the detection drive source is adapted to drive the detection screw shaft to rotate and drive the detection nut to slide in the left-right direction, and the detection head is mounted at the bottom of the detection nut and is arranged downward; the mark unit of testing is including testing mark screw shaft, testing mark head and testing mark nut, test mark screw shaft with it constitutes the ball screw structure to test mark nut, just it with second movable groove connects along controlling the direction slidable, it is suitable for the drive to test the mark driving source test mark screw shaft and rotate, and the drive test mark nut slides along controlling the direction, it installs to test mark head the bottom of testing mark nut to set up down.

Preferably, the power transmission assembly comprises a power transmission shell, a first gear, a second gear and a power switching gear are mounted in the power transmission shell, a first gear shaft is sleeved in the first gear, the first gear is rotatably mounted in the power transmission shell through the first gear shaft, and two ends of the first gear shaft are respectively connected with the detection screw shaft and the detection driving source; a second gear shaft is sleeved in the second gear, the second gear is rotatably arranged in the power transmission shell through the second gear shaft, two ends of the second gear shaft are respectively connected with the marking inspection screw shaft and the marking inspection driving source, and the detection driving source is suitable for outputting power through the first gear shaft; a first gear hole and a second gear hole are respectively formed in the power transmission shell in a matched manner with the first gear shaft and the second gear shaft, and the first gear shaft and the second gear shaft are respectively installed in the first gear hole and the second gear hole; a sliding groove is formed in the position between the first gear hole and the second gear hole in the oblique upward direction, a switching gear shaft is sleeved in the power switching gear, the end part of the switching gear shaft is slidably mounted in the sliding groove, when the first gear rotates in the clockwise direction, the switching gear shaft is located at the bottom of the sliding groove, and at the moment, the first gear, the second gear and the power switching gear are meshed with each other and are in a transmission state; when the first gear rotates along the anticlockwise direction, the switching gear shaft moves upwards, and at the moment, the first gear is only meshed with the power switching gear and is in a blocking state.

Further preferably, the left and right sides of detection module all is provided with walking assembly, the holding tank of rectangle is seted up to the walking assembly bottom, the notch of holding tank sets up down, the holding tank internal rotation ground is provided with a plurality of balls, walking assembly's bottom detachably is provided with the bottom plate, the bottom plate is suitable for the closure the holding tank, run through on the bottom plate seted up with the accommodation hole that the ball matches, the ball rotationally install in the accommodation hole, the diameter of ball is d1, the diameter of accommodation hole is d2, satisfies d1 > d2.

Further preferably, the top of determine module is provided with the mounting panel, determine module detachably installs on the mounting panel, the both sides of mounting panel with go up the box body and connect along fore-and-aft direction slidable, displacement nut around the top of mounting panel is installed, displacement screw axle around displacement nut cover is equipped with around, first driving source is suitable for the drive displacement screw axle rotates and drives around displacement nut moves along the fore-and-aft direction.

Preferably, the upper box body is provided with a guide pillar piston which protrudes downwards along the vertical direction, the lower box body is internally provided with a guide pillar oil cylinder which is matched with the guide pillar piston, the guide pillar piston can move in the guide pillar oil cylinder along the vertical direction, and the upper box body and the lower box body can be arranged in an openable manner.

Preferably, welding piece passing openings are formed in the left side and the right side of the lower box body in a penetrating mode in the left-right direction and communicated with the containing cavity, the welding piece to be detected is suitable for entering the detection equipment from the welding piece passing opening in one side and leaving the detection equipment from the welding piece passing opening in the other side.

Compared with the prior art, the beneficial effect of this application lies in:

(1) Compared with the traditional welding part detection equipment built by using sectional materials, the detection equipment disclosed by the invention has the advantages that the integrity is better, the rigidity is better, the deformation is small, the jitter is smaller during the operation, the interference of noise points in the machine identification process is reduced, and the success rate and the stability of the detection are effectively improved;

(2) The position of the welding line is conveniently positioned by utilizing the marking line and the calibration unit, the slope value of the welding line is more accurately calculated, the calculation amount required by a chip is reduced, the influence of welding quality, which causes excessive welding line identification noise points, and the technical defect of welding deviation is effectively identified, the identification precision is high, the use is convenient, the model training amount is small, and the manufacturing cost is lower.

Drawings

FIG. 1 is a schematic view of a weldment showing the locations of the marker lines and welds.

Fig. 2 is a schematic diagram of an embodiment of the detection apparatus of the present application, illustrating an operating state.

FIG. 3 is a schematic view of an embodiment of the detection apparatus of the present application, showing the upper and lower cases in an open state.

FIG. 4 is an exploded view of one embodiment of the detection apparatus of the present application, illustrating a detection assembly.

FIG. 5 is an exploded view of the detection assembly of one embodiment of the detection apparatus of the present application, showing a mounting plate.

FIG. 6 is an exploded view of the detection assembly of one embodiment of the detection apparatus of the present application, showing the detection unit and the verification unit.

Fig. 7a is a schematic operation diagram of an embodiment of the detection apparatus of the present application, showing a detection completed state.

FIG. 7b is a schematic diagram of an embodiment of the inspection apparatus of the present application, illustrating an initial inspection position in a front-to-back direction.

FIG. 7c is a schematic diagram of an embodiment of the inspection apparatus of the present application, illustrating an initial inspection position in a left-right direction.

FIG. 7d is a schematic diagram of the operation of one embodiment of the detection apparatus of the present application, showing the zero position in the left-right direction.

FIG. 8 is a flow chart of one embodiment of a detection apparatus of the present application.

FIG. 9 is a flow chart of another embodiment of the detection apparatus of the present application.

FIG. 10 is an isometric view of a detection unit and a verification unit of one embodiment of the detection apparatus of the present application.

FIG. 11 is an isometric view of another orientation of a detection unit and an authentication unit of an embodiment of the detection apparatus of the present application.

FIG. 12 is an exploded view of the power transmission assembly of one embodiment of the detection apparatus of the present application.

FIG. 13 is a schematic diagram of the operation of the power transmission assembly of one embodiment of the detection apparatus of the present application, shown in a transmitting state.

FIG. 14 is an operational schematic of the power transmission assembly of one embodiment of the detection apparatus of the present application, shown in a blocked state.

Fig. 15 is a schematic view of a walking assembly of an embodiment of the detection apparatus of the present application, showing balls and receiving grooves.

FIG. 16 is a cross-sectional view of one embodiment of the detection apparatus of the present application, showing the relationship between the ball and the receiving hole.

In the figure: 1. an upper box body; 11. a guide post piston; 2. a lower box body; 21. a guide post oil cylinder; 22. an oil cylinder mounting hole; 23. a weldment passing port; 3. a detection component; 31. a detection unit; 311. detecting a screw shaft; 312. a detection head; 313. detecting the nut; 32. a label checking unit; 321. checking a lead screw shaft; 322. checking the head; 323. checking the mark nut; 33. detecting the shell; 331. a first movable slot; 332. a second movable slot; 34. a power transmission assembly; 341. a first gear; 342. a second gear; 343. a power switching gear; 3431. switching gear shafts; 344. a power transmission housing; 3441. a sliding groove; 3442. a first gear hole; 3443. a second gear hole; 35. a counterweight assembly; 36. a walking assembly; 361. a ball bearing; 362. an accommodation hole; 363. accommodating grooves; 364. a base plate; 37. mounting a plate; 371. a screw shaft is displaced back and forth; 372. a front and rear displacement nut; 4. an accommodating chamber; 101. a first drive source; 102. a second drive source; 1021. detecting a driving source; 1022. a marking inspection driving source; 200. a welding part; 201. welding; 202. and marking lines.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations and positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

At present, the automobile sheet metal part mostly adopts a flat plate welding technology, flat plates with different strengths, toughness and shapes are welded together, and a punch forming device is used for punching to form a proper shape, so that the automobile sheet metal part has the advantages of good appearance precision, good forming quality, cost saving and the like. However, most of the welding seams 201 formed by the plate butt welding are oblique welding seams 201 (as shown in fig. 1, the welding seams 201 with a certain slope have a positive slope, and generally, the slopes of all the welding seams 201 are positive values), the conventional automatic detection equipment cannot well meet the effect of detecting the oblique welding seams 201, and the existing welding part detection equipment also has the problems that the detection is easy to make mistakes and the like.

The inventor further researches and discovers that the existing visual inspection equipment for the welding seam generally adopts a machine vision mode to detect, namely, the welding seam 201 to be detected is compared with a welding seam 201 photo which is stored in a processor and meets the requirements of visual inspection, so as to identify whether the welding seam 201 meets the requirements of visual inspection, but for the oblique welding seam 201 formed by flat plate tailor welding, the shot oblique welding seam 201 is processed into a straight welding seam 201 according to different oblique welding seam 201 slopes, wherein the processor is very difficult to extract the slopes of different oblique welding seams 201, an AI system with a large amount of training is required to accurately extract the slopes of different oblique welding seams 201, so that the manufacturing cost of the welding part detection equipment is increased, the equipment is not beneficial to the development of factories, and AI identification is still poor in stability, the equipment is easy to make mistakes and the like, and the equipment is not beneficial to continuous use of factories.

In addition, the detection is performed by using a machine vision mode, the precision requirement on the picture shot by the detection unit 31 is high, especially for the equipment for online detection, most of the existing welding part detection equipment is supported by sectional materials, and the equipment is easy to deform in use and limited by cost, and a casting cannot be adopted to manufacture a machine body, so that the rigidity of the machine body of the detection equipment is improved, and the situation that the machine body shakes greatly in the use process, the picture shot by the online detection equipment is easy to blur and misplace, and the detection is unstable is further caused.

It is worth mentioning that the existing commonly-used visual inspection equipment for the welding seam usually needs to move the detection unit 31 along the direction of the welding seam 201, and when the quality of the welding seam 201 is detected, the direction of the welding seam 201 needs to be further analyzed, the calculated amount is large, the operation amount of a processing chip is increased, the manufacturing cost is further increased, the frequent identification is inaccurate, the missing inspection, the false inspection and other alarms occur, and the speed of the manual visual inspection can not be achieved seriously or even.

In addition, for a welding part 200 formed by welding a plurality of flat plates, after entering a welding part detection device, weld joints 201 with different slopes need to be continuously detected, although the positions of the starting points of the weld joints 201 are basically the same in the front-back direction (namely, the coordinates of the starting points of the weld joints 201 in fig. 1 on the Y axis), the weld joints have different slopes, and it is also difficult to determine the specific position coordinates of the different weld joints 201 in the left-right direction (namely, the coordinates of the starting points of the weld joints 201 in fig. 1 on the X axis), so that it is difficult to complete the calculation amount by a common machine vision recognition technology, and the use requirements of a factory cannot be met.

Therefore, the inventor has developed a welding part detection device, an embodiment of which is shown in fig. 1 to 16, and includes an upper box body 1 and a lower box body 2, the lower box body 2 is adapted to be mounted on a base surface, the upper box body 1 is openably disposed above the lower box body 2, inner walls of the upper box body 1 and the lower box body 2 jointly define a receiving cavity 4, a detection assembly 3 is movably disposed in the receiving cavity 4 along a front-rear direction, a detection unit 31 and a calibration unit 32 are movably disposed on the detection assembly 3 along a left-right direction, a welding part 200 to be detected is adapted to be disposed in the receiving cavity 4, the welding part 200 has a welding line 201 and a marking line 202, the welding line 201 and the marking line 202 are both disposed upward, and a central position of the welding line 201 and a distance D1 of the marking line 202 along the left-right direction are unchanged (as a solid line represents the central position of the welding line 201 and a dot-dash line represents the position of the marking line 202 in fig. 1), and the detection unit 31 and the calibration unit 32 and 201 and the marking line 202 are controlled to correspond to the orientation of the marking line 202, and the welding line D2= D1 along the left-right direction; wherein the orientation corresponds to that if the marking line 202 is located at the left side of the weld 201, the marking unit 32 is also located at the left side of the detection unit 31; similarly, if the marking line 202 is located on the right side of the weld 201, the verification unit 32 is also located on the right side of the detection unit 31. In this particular embodiment, the marking line 202 is located on the right side of the weld 201 (as shown in FIG. 1), and the marking unit 32 is located on the right side of the detection unit 31 (as shown in FIG. 7 a);

when the marking process is performed, the detecting unit 31 is located at the initial detecting position in the front-back direction (i.e. in the Y-axis direction) by controlling the detecting assembly 3 to move in the front-back direction (i.e. in the Y-axis direction), then the marking unit 32 is adapted to move in the left-right direction (i.e. in the X-axis direction) with the detecting unit 31, and the direction and position of the welding seam 201 are located by the marking line 202, so that the detecting unit 31 is located at the initial detecting position in the left-right direction (i.e. in the X-axis direction), and the detecting unit 31, the marking unit 32 and the welding seam 201 are controlled to correspond to the marking line 202 in orientation, and the distance D2= D1 in the left-right direction; when the inspection process is performed, the detection unit 31 is adapted to move according to the orientation and position of the weld 201 positioned by the inspection unit 32 and detect the external welding quality of the weld 201.

As shown in fig. 8, in the process of performing the marking inspection, the detecting assembly 3 is controlled to move in the front-back direction (i.e. the Y-axis direction), as shown in fig. 7a, since the detecting unit 31 and the marking inspection unit 32 are both disposed on the detecting assembly 3, when the detecting assembly 3 moves in the front-back direction, both the detecting unit 31 and the marking inspection unit 32 will move in the back-back direction at the same speed, and it can be understood that the detecting unit 31 is located at the initial detecting position in the front-back direction, that is, the Y-axis coordinate of the position is the same as the Y-axis coordinate of the starting point of the welding seam 201; subsequently, the calibration unit 32 and the detection unit 31 are synchronously moved along the X-axis direction as shown in fig. 7b until the calibration unit 32 reaches the start point of the mark line 202, that is, as shown in fig. 7c, and at this time, the detection unit 31 is at the starting detection position in the left-right direction, that is, the X-axis coordinate of the position is the same as the X-axis coordinate of the start point of the weld 201.

In addition, because the detection unit 31 and the verification unit 32 are made by adopting a camera and matching with a machine vision detection principle, and the camera has a certain visual angle, the detection unit 31 and the verification unit 32 do not need to be additionally controlled to be the same as the Y-axis coordinates of the welding seam 201 and the marking line 202, and the verification and inspection processes can be realized only by ensuring that the X-axis coordinates are the same. In this case, as shown in fig. 7a, the starting detection position of the detection unit 31 in the front-back direction can be widened by a fixed offset distance a (as shown in fig. 7 b) interpreted as the Y-axis coordinate of the position being equal to the Y-axis coordinate of the start of the weld 201, and the fixed offset distance a needs to be changed according to the size of the view angle of the camera, so that the head of the weld 201 can be observed when the detection unit 31 moves along the X-axis.

In addition, since the displacement device for limiting the welding part 200 during the detection process is the prior art, for example, the welding part 200 is limited by using a movable pressing plate, which is not described herein.

The weld part detection device developed by the inventor of the present application, wherein the detection assembly 3 arranged in the device comprises a detection unit 31 and a calibration unit 32, wherein the calibration unit 32 is used for tracking and analyzing the trend and the position of the mark line 202, and since it is difficult to directly identify the weld seam 201 by using a machine vision identification device, a mark line 202 which is completely parallel to the weld seam 201 can be generated beside the weld seam 201 to be detected, and the distance between the mark line and the weld seam is D1 all the time. The method for generating the marking line 202 can be formed by slightly contacting the surface of the welding part 200 by using a sharp marking tool, and the marking tool can also be directly bound beside a laser welding head for laser welding, and meanwhile, the marking line 202 is generated, because the automobile sheet metal is subjected to paint spraying treatment subsequently, the marked marking line 202 is easily covered, and the shape of the final finished automobile sheet metal is not influenced. In addition, the detection unit 31 and the label checking unit 32 both include cameras for extracting images, and detect the quality of the weld 201 and the direction of the mark line 202 by using a visual recognition algorithm, and the specific detection algorithm for the quality of the weld 201, the specific algorithm for recognizing the mark line 202 and the slope thereof are the prior art and are not described in detail. Because the mark line 202 is easier to pass through a machine vision recognition algorithm relative to the weld 201, the noise generated by the mark line is small, the slope and the position of the mark line 202 are easy to recognize through the mark line 202, and the position of the center of the weld 201 is easy to reverse because the center positions of the mark line 202 and the weld 201 are always D1.

The upper box body 1 can be arranged above the lower box body 2 in an opening and closing manner, and has two benefits: one is that the rigidity of the whole machine body can be increased when the detection equipment runs, and compared with the traditional machine body constructed by sectional materials, the machine body has stronger stability, smaller deformation and smaller shake during running, and can be designed in an open-close manner to be convenient to install and maintain; secondly, other limiting parts are convenient to add and used for limiting the displacement of the welding part 200 placed in the accommodating cavity 4.

When performing the inspection process, the inspection unit 31 is located at the initial inspection position in the front-rear direction by controlling the inspection assembly 3 to move in the front-rear direction (i.e. the Y-axis coordinate of the start point of the weld 201 is equal to the Y-axis coordinate of the position of the inspection unit 31 at this time, and a may be zero), and then the inspection unit 32 is adapted to move in the left-right direction in synchronization with the inspection unit 31, depending on whether the marking line 202 is located on the left side or the right side of the inspection unit 32 at this time (in this specific embodiment, as shown in fig. 7b, the marking line 202 is located on the right side of the inspection unit 32, and thus the inspection unit 32 is controlled to move in synchronization with the inspection unit 31 at this time), and during this movement, the inspection unit 32 passes over the marking line 202, and the slope of the marking line 202 is calculated by the visual recognition algorithm, and the X-axis coordinate of the start point of the weld 201 is determined, so that the inspection unit 31 is located at the initial inspection position in the left-right direction (i.e. the X-axis coordinate of the start point of the weld 201 is the same as the X-axis coordinate of the position of the detection unit 31 at this time, and thus the inspection unit 32 may be performed completely as shown in fig. 7 c), and thus the next inspection process, the inspection unit 31, the inspection process, and thus the inspection unit may be performed by using the inspection unit 31, and thus the inspection process, and thus the inspection unit 31, and thus the next step may be performed. In the inspection process, the movement of the detection unit 31 is formed by combining the displacement of the detection unit 31 itself in the left-right direction and the displacement of the detection assembly 3 in the front-back direction, so that a movement with a certain slope can be formed, the detection unit 31 is always located above the weld 201, and rapid online detection is realized.

It is worth mentioning that, in the actual use process, because the same welding part 200 is provided with a plurality of welding seams 201 with different slopes, after the detection of one welding seam 201 is completed, the detection assembly 3 can reenter the mark checking process, and when the detection assembly 3 is controlled to move along the front-back direction, the mark checking unit 32 is not in the working state at this moment, in the process, the pushing device can be utilized to push the welding part 200, so that the detected welding seam 201 leaves the detection area, and the welding seam 201 to be detected enters the detection area, after the welding seam 201 to be detected completely enters the detection area, the mark checking unit 32 and the detection unit 31 can synchronously move towards the left or the right, and the mark checking unit 32 is in the working state, so as to identify the slopes and the positions of the mark lines 202.

Compared with the traditional welding part detection equipment, the detection equipment disclosed by the invention has the following advantages: (1) The upper box body 1 and the lower box body 2 which can be opened and closed are utilized, so that the integrity of the detection equipment is improved, the rigidity of the whole detection equipment is effectively improved, and the deformation and the shaking phenomenon in operation are reduced; (2) Reduce the training volume of AI model, do not need the different welding seam 201 of the accurate discernment of training model, only need discernment mark line 202, can the slope of positioning weld 201 position and welding seam 201, manufacturing cost is lower, more effectual welding seam 201's of satisfying different slopes detection, and in the on-line measuring process, because the corresponding speed that needs is faster, the algorithm functioning speed of discernment mark line 202 is faster, response speed is also faster, and because the operand that needs to use is less, the processing cost of chip also gives up, can use comparatively ripe low end chip, further reduce manufacturing cost.

Further preferably, as shown in fig. 5 and 6, the detecting assembly 3 includes a detecting housing 33, a first movable groove 331 and a second movable groove 332 are respectively arranged in the detecting housing 33 along the left-right direction (the first movable groove 331 and the second movable groove 332 arranged along the left-right direction, that is, the first movable groove 331 runs along the left-right direction, and the second movable groove 332 runs along the left-right direction, as shown in fig. 6), the notches of the first movable groove 331 and the second movable groove 332 are both arranged downward, the first movable groove 331 and the second movable groove 332 are sequentially arranged along the front-back direction, the detecting unit 31 and the verifying unit 32 are respectively arranged in the first movable groove 331 and the second movable groove 332, and the detecting unit 31 and the verifying unit 32 are arranged in a staggered manner in the left-right direction (the staggered manner in the left-right direction means that the X-axis coordinates of the detecting unit 31 and the verifying unit 32 are different in size, it is easy to understand that the difference value is D2), and the detecting unit 31 and the detecting unit are adapted to respectively move in the first movable groove 331 and the second movable groove 332 along the left-right direction; the weld detecting apparatus further includes a first driving source 101 and a second driving source 102, the first driving source 101 being adapted to drive the detecting unit 3 to move in the front-rear direction, the second driving source 102 having two and being adapted to drive the detecting unit 31 and the verifying unit 32 to move in the left-right direction, respectively;

when the marking process is performed, the first driving source 101 controls the detection assembly 3 to move in the front-back direction and enables the detection unit 31 to be at the front-back direction starting detection position, then the second driving source 102 drives the marking unit 32 and the detection unit 31 to move synchronously, the trend and the position of the welding seam 201 are positioned through the marking line 202, and meanwhile, the distance D2= D1 between the marking unit 32 and the detection unit 31 is controlled, and the detection unit 31 is enabled to be at the left-right direction starting detection position; when the inspection process is performed, the detection unit 31 is adapted to move according to the orientation and position of the bead 201 positioned by the inspection unit 32 under the driving of the first driving source 101 and the second driving source 102, and detect the external welding quality of the bead 201, and the detection unit 31 moves in synchronization with the inspection unit 32.

Since the first movable groove 331 and the second movable groove 332 are sequentially arranged in the front-rear direction, the detection unit 31 and the calibration unit 32 respectively installed in the first movable groove 331 and the second movable groove 332 are also arranged in a staggered manner in the front-rear direction (that is, the Y-axis coordinates of the detection unit 31 and the calibration unit 32 are different), when aiming at the oblique weld 201 with the slope greater than zero, as shown in fig. 7a to 7d, in the inspection process (that is, shown in fig. 7 c), since the calibration unit 32 is arranged at the rear side of the detection unit 31 (that is, the Y-axis coordinate of the calibration unit 32 is smaller than the Y-axis coordinate of the detection unit 31), in the inspection process (as shown in fig. 7 c), the calibration unit 32 scans the trend change of the mark line 202 first, so that the speed of the detection unit 31 moving along the X-axis can be changed according to the trend change of the mark line 202, thereby always keeping the weld 201 at a good observation position of the detection unit 31, effectively improving the stability of the detection, and when encountering a complex weld 201, such as a zigzag-shaped weld 201, the speed of the detection unit 32 can read the change of the slope of the detection unit 31, thereby enabling the detection unit 201 of the detection unit 201 to calculate the change of the slope of the detection unit 201, thereby the detection unit 201, and the detection unit 201 of the slope of the detection unit 201, thereby. In this way, the detection unit 31 can be prevented from encountering the slope change of the welding seam 201 or the influence of jitter generated in operation on the detection result, so that the durability of the welding part detection equipment is improved.

Further preferably, as shown in fig. 6, the second driving source 102 includes a detection driving source 1021 and a calibration driving source 1022, the detection driving source 1021 and the calibration driving source 1022 are adapted to drive the detection unit 31 and the calibration unit 32 to move in the left and right directions through a ball screw structure, respectively, and an angular displacement sensor is mounted on the calibration driving source 1022, the angular displacement sensor being adapted to detect the magnitude of an angular displacement of the rotation of the calibration driving source 1022;

when the mark checking process is performed, the first driving source 101 controls the detection unit 31 to move in the front-back direction, and the detection unit 31 is located at the initial detection position in the front-back direction, and then the detection driving source 1021 and the mark checking driving source 1022 drive the detection unit 31 and the mark checking unit 32 to move until the mark checking unit 32 is located at the zero position in the left-right direction, and the distance between the detection unit 31 and the mark checking unit 32 is D2, and the orientation and the position of the weld seam 201 are preliminarily positioned according to the angular displacement alpha recorded by the angular displacement sensor and the orientation of the mark line 202 recorded by the mark checking unit 32 when the mark checking unit 32 passes the mark line 202 for the first time; then, the detection driving source 1021 and the calibration driving source 1022 respectively drive the detection unit 31 and the calibration unit 32 to synchronously move in opposite directions, and the detection unit 31 is positioned at the initial detection position in the left-right direction according to the angular displacement amount α and the position of the precise positioning weld 201 of the calibration unit 32. It is worth mentioning that the zero position refers to a side end position of the left-right displacement, that is, a maximum displacement position of the calibration unit 32 in the left-right direction.

Because the marking unit 32 is directly relied on to stop in time when detecting the position of the head of the marking line 202, so as to meet the requirement that the welding seam 201 is positioned at the detection position below the detection unit 31, in the actual use process, the braking process has certain delay time, and the braking can not be carried out in time due to the influence of inertia, in addition, the online detection method needs more operations, and causes the problems of slow response, inaccurate detection and the like.

Therefore, the process is further optimized, and the specific flow chart is shown in fig. 8 and is performed according to the following steps: (1) The detecting member 3 is moved to a detection initial position in the front-rear direction (as shown in fig. 7 b); (2) The calibration unit 32 moves to the left and right zero positions (as shown in fig. 7 d); (3) The detecting unit 31 and the index unit 32 return to the detection initial positions in the left-right direction (as shown in fig. 7 c); and (4) starting detection. By using the method, when the detection unit 31 and the calibration unit 32 move to the zero positions in the left-right direction, the calibration unit 32 passes through the marking line 202 and can record the angular displacement alpha at the moment by matching with the angular displacement sensor, so that the position of the marking line 202 is roughly calculated, and the position of the welding seam 201 can be reversely pushed out because the distance between the marking line 202 and the welding seam 201 is kept at D1. Then, the movement is performed from the null position direction, and the deceleration is performed when the approximate position of the mark line 202 is approached, so that the precise positioning of the solid mark line 202 and the position of the weld 201 are precisely positioned. Therefore, the shooting frequency of the calibration unit 32 is reduced, the data amount to be processed is reduced, and the manufacturing cost of the chip is effectively reduced. In addition, in step (2), the synchronous movement of the detecting unit 31 and the calibration unit 32 is not required, and when the calibration unit 32 is only required to move to the zero position in the left-right direction, the distance between the detecting unit 31 and the calibration unit 32 is D2, and D2= D1, before starting the inspection process.

Further preferably, as shown in fig. 6, the left and right sides of the detecting component 3 are respectively provided with a power transmission component 34 and a counterweight component 35, the power transmission component 34 is provided with a detecting driving source 1021, the detecting driving source 1021 is in closed-loop control, the power transmission component 34 has two working states, namely a transmission state and a blocking state, and when in the transmission state, the power output by the detecting driving source 1021 is suitable for being output through the power transmission component 34, so as to drive the detecting unit 31 and the calibration unit 32 to move simultaneously; when in the blocking state, the power output by the detection driving source 1021 can only drive the detection unit 31 to move; the counterweight assembly 35 is provided with a calibration driving source 1022, the calibration driving source 1022 is controlled in an open loop mode, the calibration driving source 1022 is suitable for driving the calibration unit 32 to move along the left and right directions independently, and the counterweight assembly 35 is suitable for balancing the gravity of the power transmission assembly 34, so that the center of gravity of the detection assembly 3 is located at the middle part. It will be readily appreciated that the power transmission assembly 34, which may have a transmission state and a retarding state, has a variety of different configurations, such as utilizing a variable wheelbase gear to effect power take-off and cut-off.

In the actual use process, the detection unit 31 and the calibration unit 32 are driven to move respectively by the detection drive source 1021 and the calibration drive source 1022 according to the flow of fig. 9, so that the calibration unit 32 is in the zero position in the left-right direction, and the distance between the calibration unit 32 and the detection unit 31 is D2, at this time, the power output assembly is in the blocking state, the calibration drive source 1022 under open-loop control drives the calibration unit 32 to move until the calibration unit 32 is in the zero position in the left-right direction (the calibration drive source 1022 is switched by using the proximity switch), the detection drive source 1021 under closed-loop control drives the detection unit 31 to move, so that the distance between the detection unit 31 and the calibration unit 32 is D1, and the calibration drive source 1022 under open-loop control is reset to zero each time, so that the detection drive source 1021 under closed-loop control can reduce the generation of accumulated errors. And then enters a checking process, in which the power transmission assembly 34 is in a transmission state, and the detection driving source 1021 rotates to simultaneously drive the detection unit 31 and the calibration unit 32 to move synchronously.

Setting the detection driving source 1021 as closed-loop control and the calibration driving source 1022 as open-loop control has two beneficial effects: (1) Because the detection unit 31 and the verification unit 32 need to move synchronously, if the detection driving source 1021 and the verification driving source 1022 are simultaneously controlled in a closed loop mode, the cost is high, synchronous control can be performed, a plurality of sensors need to be connected externally, the cost of a driver and a controller is high, only the detection driving source 1021 is controlled in the closed loop mode, the verification driving source 1022 is controlled in the open loop mode, and the power transmission assembly 34 is used for switching the working state, so that the synchronous movement can be realized, the relative or opposite movement can be realized, the verification process and the inspection process can be effectively finished, and the production cost is greatly reduced; (2) In addition, because the closed-loop control system usually has accumulated errors, and finally, the problem of overlarge errors is caused under a certain number of times of repetition, the calibration unit 32 controlled by the open loop returns to the zero position in the left and right directions, so that the distance between the detection unit 31 and the calibration unit 32 is corrected again, and D2= D1 is kept all the time, and thus, the accumulated errors are eliminated before the start of each inspection process, and the error reporting situation is reduced.

Further preferably, as shown in fig. 10 and 11, the detecting unit 31 includes a detecting screw shaft 311, a detecting head 312, and a detecting nut 313, the detecting screw shaft 311 and the detecting nut 313 constitute a ball screw structure, the detecting nut 313 is slidably connected to the first movable groove 331 in the left-right direction, the detecting drive source 1021 is adapted to drive the detecting screw shaft 311 to rotate and drive the detecting nut 313 to slide in the left-right direction, and the detecting head 312 is mounted at the bottom of the detecting nut 313 and is disposed downward; the label checking unit 32 comprises a label checking screw shaft 321, a label checking head 322 and a label checking nut 323, the label checking screw shaft 321 and the label checking nut 323 form a ball screw structure, the label checking nut 323 is slidably connected with the second movable groove 332 in the left-right direction, the label checking driving source 1022 is suitable for driving the label checking screw shaft 321 to rotate and driving the label checking nut 323 to slide in the left-right direction, and the label checking head 322 is installed at the bottom of the label checking nut 323 and arranged downwards.

Utilize ball structure drive detecting element 31 and the motion of the unit 32 of testing mark along the left right direction, can accurate control detecting element 31 and the distance of the unit 32 of testing mark along the left right direction displacement, realize accurate control to promote this check out test set's durability and stability.

Further preferably, as shown in fig. 12 to 14, the power transmission assembly 34 includes a power transmission housing 344, a first gear 341, a second gear 342 and a power switching gear 343 are mounted in the power transmission housing 344, a first gear shaft is mounted in the first gear 341, the first gear 341 is rotatably mounted in the power transmission housing 344 through the first gear shaft, and two ends of the first gear shaft are respectively connected with the detection screw shaft 311 and the detection driving source 1021; a second gear shaft is sleeved in the second gear 342, the second gear 342 is rotatably installed in the power transmission housing 344 through the second gear shaft, and two ends of the second gear shaft are respectively connected with the calibration screw shaft 321 and the calibration driving source 1022, and the detection driving source 1021 is suitable for outputting power through the first gear shaft; a first gear hole 3442 and a second gear hole 3443 are respectively formed on the power transmission housing 344 in a matching manner with the first gear shaft and the second gear shaft, which are respectively installed in the first gear hole 3442 and the second gear hole 3443; a sliding groove 3441 is provided between the first gear hole 3442 and the second gear hole 3443 in an oblique upward direction, a switching gear shaft 3431 is fitted inside the power switching gear 343, an end of the switching gear shaft 3431 is slidably fitted in the sliding groove 3441, when the first gear 341 rotates in a clockwise direction, the switching gear shaft 3431 is located at the bottom of the sliding groove 3441, and at this time, the first gear 341, the second gear 342 and the power switching gear 343 are engaged with each other and are in a transmission state; when the first gear 342 rotates in the counterclockwise direction, the switching gear shaft 3431 moves upward, and at this time, the first gear 341 is engaged with only the power switching gear 343 and is in a blocking state.

By providing the first gear 341, the second gear 342, and the power switching gear 343, and providing the sliding groove 3441 on the power transmission housing 344, the power transmission assembly 34 can be connected and disconnected with a simpler structure, as shown in fig. 13, when the detection driving source 1021 rotates clockwise, the first gear 341 is driven to rotate clockwise, so that the first gear 341, the second gear 342, and the power switching gear 343 are in a transmission state, and the first gear 341 rotates clockwise, so that the second gear 342 rotates clockwise, so that the detection unit 31 and the calibration unit 32 move synchronously (in this specific embodiment, as shown in fig. 7c, the calibration unit moves synchronously rightward), so as to implement the calibration process; when the detection driving source 1021 rotates counterclockwise, the power transmission assembly 34 is in a blocking state, and at this time, the detection driving source 1021 rotates counterclockwise, and can drive the detection unit 31 to move leftward, thereby implementing the label checking process. In addition, the one-way overrunning clutch can be utilized to reduce the resistance in the power transmission state.

Further preferably, as shown in fig. 5, 15 and 16, the left side and the right side of the detection assembly 3 are both provided with the walking assembly 36, the bottom of the walking assembly 36 is provided with a rectangular accommodation slot 363, a slot of the accommodation slot 363 is arranged downward, the accommodation slot 363 is rotatably provided with a plurality of balls 361, the bottom of the walking assembly 36 is detachably provided with a bottom plate 364, the bottom plate 364 is suitable for sealing the accommodation slot 363, the bottom plate 364 is provided with an accommodation hole 362 which is matched with the balls 361 in a penetrating manner, the balls 361 are rotatably installed in the accommodation hole 362, the diameter of the balls 361 is d1, the diameter of the accommodation hole 362 is d2, and d1 > d2 is satisfied.

The walking assembly 36 is arranged, so that the bottom of the ball 361 props against the top of the welding part 200 in the checking process, the friction force borne by the detection assembly 3 in the running process can be reduced, part of gravity can be shared, and the welding part 200 is assisted to be compressed.

Further preferably, as shown in fig. 5, a mounting plate 37 is disposed on the top of the detection unit 3, the detection unit 3 is detachably mounted on the mounting plate 37, two sides of the mounting plate 37 are slidably connected to the upper case 1 along the front-back direction, a front-back displacement nut 372 is mounted on the top of the mounting plate 37, the front-back displacement nut 372 is sleeved with a front-back displacement screw shaft 371, and the first driving source 101 is adapted to drive the front-back displacement screw shaft 371 to rotate and drive the front-back displacement nut 372 to move along the front-back direction.

Set up mounting panel 37 and can increase determine module 3's an organic whole nature, reduce the shake in the motion process to promote this check out test set's stability and durability, displacement screw shaft 371 and displacement nut 372 can accurate control determine module 3 displacement in the front and back direction around setting up.

Further preferably, as shown in fig. 4, a guide post piston 11 is provided on the upper case 1 to protrude downward in the vertical direction, a guide post cylinder 21 is provided in the lower case 2 to match with the guide post piston 11, the guide post piston 11 can move in the guide post cylinder 21 in the vertical direction, and the upper case 1 and the lower case 2 can be provided in an openable manner. In this particular embodiment, the post cylinder 21 is mounted in a cylinder mounting hole 22 provided in the lower case 2 in the up-down direction.

The guide post piston 11 is matched with the guide post oil cylinder 21, so that the upper box body 1 and the lower box body 2 can be connected with each other in an openable and closable manner, the box is more stable and durable, and the load capacity is better.

Further preferably, as shown in fig. 2 and 3, a welding member passing opening 23 is formed in the left side and the right side of the lower box 2 in a left-right direction in a penetrating manner, the welding member passing opening 23 is communicated with the accommodating chamber 4, and the welding member 200 to be detected is suitable for entering the detection device from the welding member passing opening 23 on one side and leaving the detection device from the welding member passing opening 23 on the other side.

Set up welding spare through-hole 23 and make it communicate and hold chamber 4, can be convenient at full automatic operation in-process, need not the repeated opening and close box body 1 and lower box body 2 to improve detection speed, reduce and detect the cost.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. The welding part detection equipment is characterized by comprising an upper box body and a lower box body, wherein the lower box body is suitable for being installed on a base surface, the upper box body is arranged above the lower box body in an openable mode, an accommodating cavity is defined by the inner walls of the upper box body and the lower box body together, a detection assembly is movably arranged in the accommodating cavity along the front-back direction, a detection unit and a marking unit are movably arranged on the detection assembly along the left-right direction, a welding part to be detected is suitable for being placed in the accommodating cavity, a welding line and a marking line are arranged on the welding part, the welding line and the marking line are arranged upwards, the distance D1 between the center position of the welding line and the marking line along the left-right direction is unchanged, the detection unit and the marking unit and the welding line are controlled to correspond to the marking line in position, and the distance D2= D1 along the left-right direction;

when the marking inspection process is carried out, the detection assembly is controlled to move along the front-back direction, so that the detection unit is located at the initial detection position in the front-back direction, then the marking inspection unit is suitable for moving left or right directions with the detection unit, the trend and the position of the welding line are located through the marking line, the detection unit is located at the initial detection position in the left-right direction, the detection unit, the marking inspection unit, the welding line and the marking line are controlled to correspond in position, and the distance D2= D1 in the left-right direction is achieved; when the inspection process is carried out, the detection unit is suitable for moving according to the trend and the position of the welding seam positioned by the calibration unit, and detecting the external welding quality of the welding seam.

2. The weldment detecting apparatus according to claim 1, wherein the detecting assembly includes a detecting housing, the detecting housing being provided therein with a first movable groove and a second movable groove in the left-right direction, respectively, notches of the first movable groove and the second movable groove being provided downward, and the first movable groove and the second movable groove being arranged in the front-rear direction in sequence, the detecting unit and the marking unit being installed in the first movable groove and the second movable groove, respectively, and the detecting unit and the marking unit being arranged in a staggered manner in the left-right direction and adapted to move in the left-right direction in the first movable groove and the second movable groove, respectively; the welding part detection device further comprises a first driving source and a second driving source, wherein the first driving source is suitable for driving the detection assembly to move in the front-back direction, the second driving source is provided with two driving sources, and the two driving sources are suitable for respectively driving the detection unit and the calibration unit to move in the left-right direction;

when the marking process is carried out, the first driving source is used for controlling the detection assembly to move along the front-back direction and enabling the detection unit to be located at the initial detection position of the front-back direction, then the second driving source is used for driving the marking unit and the detection unit to move, the trend and the position of the welding seam are located through the marking line, and meanwhile, the distance D2= D1 between the marking unit and the detection unit is controlled, so that the detection unit is located at the initial detection position of the left-right direction; when the detection process is carried out, the detection unit is suitable for moving according to the trend and the position of the welding seam positioned by the calibration unit under the driving of the first driving source and the second driving source, the external welding quality of the welding seam is detected, and the detection unit and the calibration unit synchronously move.

3. A weld detecting apparatus as set forth in claim 2, wherein said second driving source includes a detecting driving source and a marking driving source adapted to drive said detecting unit and said marking unit to move in the left-right direction by means of ball screw structures, respectively, said marking driving source having an angular displacement sensor mounted thereon, said angular displacement sensor being adapted to detect the magnitude of angular displacement of rotation of said marking driving source;

when the marking process is carried out, the first driving source controls the detection unit to move along the front-back direction and enables the detection unit to be at the initial detection position of the front-back direction, then the detection driving source and the marking driving source drive the detection unit and the marking unit to move until the marking unit is at the zero position of the left-right direction, the distance between the detection unit and the marking unit is controlled to be D2, and meanwhile, the trend and the position of the welding line are preliminarily positioned according to the angular displacement alpha recorded by the angular displacement sensor and the trend of the marking line recorded by the marking unit when the marking unit passes through the marking line for the first time; and then the detection driving source and the calibration driving source respectively drive the detection unit and the calibration unit to synchronously and reversely move, and the position of the welding seam is accurately positioned according to the angular displacement alpha and the calibration unit, so that the detection unit is positioned at the initial detection position in the left-right direction.

4. A weld assembly detecting device as claimed in claim 3, wherein the detecting assembly is provided with a power transmission assembly and a counterweight assembly on the left and right sides thereof, the power transmission assembly is provided with the detecting driving source, the detecting driving source is closed-loop controlled, the power transmission assembly has two working states, namely a transmission state and a blocking state, and when in the transmission state, the power output by the detecting driving source is suitable for being output through the power transmission assembly, so as to drive the detecting unit and the calibration unit to move simultaneously; when in a retarding state, the power output by the detection driving source can only drive the detection unit to move; the installation on the counter weight component the mark driver source of testing, it is open loop control to test the mark driver source, it is suitable for the individual drive to test the mark driver source the unit motion of left right direction is tested to the mark unit, the counter weight component is suitable for the balance the gravity of power transmission subassembly makes the detection component's focus is in the middle part.

5. The weld detecting apparatus according to claim 4, wherein the detecting unit includes a detection screw shaft, a detection head, and a detection nut, the detection screw shaft and the detection nut constituting a ball screw structure, the detection nut being slidably connected to the first movable groove in the left-right direction, the detection drive source being adapted to drive the detection screw shaft to rotate and drive the detection nut to slide in the left-right direction, the detection head being mounted on a bottom portion of the detection nut and disposed downward; the mark unit of testing is including testing mark screw shaft, testing mark head and testing mark nut, test mark screw shaft with it constitutes the ball screw structure to test mark nut, just it with second movable groove connects along controlling the direction slidable, it is suitable for the drive to test the mark driving source test mark screw shaft and rotate, and the drive test mark nut slides along controlling the direction, it installs to test mark head the bottom of testing mark nut to set up down.

6. The weldment detecting apparatus according to claim 5, wherein the power transmission assembly includes a power transmission housing, a first gear, a second gear, and a power switching gear are mounted in the power transmission housing, a first gear shaft is mounted in the first gear, the first gear is rotatably mounted in the power transmission housing via the first gear shaft, and both ends of the first gear shaft are respectively connected to the detection screw shaft and the detection drive source; a second gear shaft is sleeved in the second gear, the second gear is rotatably arranged in the power transmission shell through the second gear shaft, two ends of the second gear shaft are respectively connected with the marking testing screw shaft and the marking testing driving source, and the detection driving source is suitable for outputting power through the first gear shaft; a first gear hole and a second gear hole are respectively formed in the power transmission shell in a matched manner with the first gear shaft and the second gear shaft, and the first gear shaft and the second gear shaft are respectively installed in the first gear hole and the second gear hole; a sliding groove is formed in the position between the first gear hole and the second gear hole in the oblique upward direction, a switching gear shaft is sleeved in the power switching gear, the end part of the switching gear shaft is slidably mounted in the sliding groove, when the first gear rotates in the clockwise direction, the switching gear shaft is located at the bottom of the sliding groove, and at the moment, the first gear, the second gear and the power switching gear are meshed with each other and are in a transmission state; when the first gear rotates along the anticlockwise direction, the switching gear shaft moves upwards, and at the moment, the first gear is only meshed with the power switching gear and is in a blocking state.

7. The weld assembly detection device according to claim 4, wherein the left side and the right side of the detection assembly are provided with the walking assemblies, rectangular accommodating grooves are formed in the bottoms of the walking assemblies, notches of the accommodating grooves face downward, a plurality of balls are rotatably arranged in the accommodating grooves, a bottom plate is detachably arranged at the bottoms of the walking assemblies, the bottom plate is suitable for sealing the accommodating grooves, accommodating holes matched with the balls are formed in the bottom plate in a penetrating manner, the balls are rotatably mounted in the accommodating holes, the diameter of each ball is d1, the diameter of each accommodating hole is d2, and d1 > d2 is satisfied.

8. A weldment detecting apparatus as claimed in claim 7, wherein a mounting plate is provided on a top of said detecting member, said detecting member is detachably mounted on said mounting plate, both sides of said mounting plate are slidably connected to said upper case in a front-rear direction, a front-rear displacement nut is mounted on a top of said mounting plate, said front-rear displacement nut is fitted with a front-rear displacement screw shaft, and said first driving source is adapted to drive said front-rear displacement screw shaft to rotate and said front-rear displacement nut to move in a front-rear direction.

9. The weld detecting apparatus according to claim 1, wherein a guide post piston is provided to protrude downward in the up-down direction on the upper case, and a guide post cylinder is provided to match the guide post piston in the lower case, the guide post piston being movable in the guide post cylinder in the up-down direction, thereby achieving the openable and closable arrangement of the upper case and the lower case.

10. The welding part detection device as claimed in claim 1, wherein welding part passing openings are formed in the left side and the right side of the lower box body in a left-right direction in a penetrating manner, the welding part passing openings are communicated with the accommodating cavity, and the welding part to be detected is suitable for entering the detection device from the welding part passing opening on one side and leaving the detection device from the welding part passing opening on the other side.