CN115980092B

CN115980092B - Welding part detection equipment

Info

Publication number: CN115980092B
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: 2023-06-23
Anticipated expiration: 2043-03-20
Also published as: CN115980092A

Abstract

The application discloses weldment check out test set includes box body and lower box body, lower box body is suitable for to install on the basal plane, go up the box body and set up the top at lower box body with opening and shutting, go up the box body and the inner wall of box body down is jointly defined and is held the chamber, it is provided with the detection component to hold the intracavity along fore-and-aft direction movably, it is provided with detecting element and mark checking unit to detect along controlling the direction on the component, the weldment that waits to detect is suitable for placing and holds the intracavity, weld and mark line have on the weldment, weld and mark line all set up, and the central point of weld puts and mark line is along controlling distance D1 of controlling the position and is corresponding with mark checking unit and weld and mark line position, and along the distance d2=d1 of controlling the direction. An object of the present application is to develop a weldment inspection apparatus that is low in manufacturing cost, high in inspection quality, and suitable for inspection of welds of different slopes.

Description

Welding part detection equipment

Technical Field

The application relates to the field of welding detection, in particular to welding detection equipment.

Background

At present, the weld joint detection of welding parts generally has two modes: x-ray flaw detection and visual detection, wherein the X-ray flaw detection is mainly used for detecting the welding quality inside a welding line, is mainly used for improving the connection strength of the welding line, and is generally used for a tank body; the 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 seam excess height, and is generally used for monitoring the quality outside the welding seam in the application of automobile sheet metal parts.

However, for the existing plate welding technology used in a large amount, due to the fact that the number of welding lines is increased, the trend of single welding lines is different, and long welding lines appear, the workload of visual detection needed to be carried out is increased sharply, automatic equipment is needed to replace manual visual detection, product quality is improved, and meanwhile time needed for detection is shortened, so that the production needs of new technology are met. However, the existing automatic welding part detection equipment is high in manufacturing cost, poor in use stability, difficult to detect welding seams with different slopes, and frequent phenomena of missing detection, false detection and the like are required to be solved by those skilled in the art.

Disclosure of Invention

An object of the present application is to develop a weldment inspection apparatus that is low in manufacturing cost, high in inspection quality, and suitable for inspection of welds of different slopes.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

the welding piece detection equipment 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 and closable manner, an accommodating cavity is defined by the upper box body and the inner wall of the lower box body, a detection component is movably arranged in the accommodating cavity along the front-rear direction, a detection unit and a mark detection unit are movably arranged on the detection component along the left-right direction, a welding piece to be detected is suitable for being placed in the accommodating cavity, a welding seam and a mark line are arranged on the welding piece, the welding seam and the mark line are upwards arranged, the center position of the welding seam is unchanged from the distance D1 of the mark line along the left-right direction, the detection unit corresponds to the mark detection unit and the welding seam in an azimuth manner, and the distance D2 = D1 along the left-right direction is controlled;

When the mark checking procedure is carried out, the detection assembly is controlled to move in the front-back direction, so that the detection unit is positioned at an initial detection position in the front-back direction, then the mark checking unit is suitable for moving leftwards or rightwards with the detection unit, the trend and the position of the welding line are positioned through the mark line, the detection unit is positioned at the initial detection position in the left-right direction, the detection unit, the mark checking unit and the welding line are controlled to correspond to the mark line in azimuth, and the distance D2 = D1 in the left-right direction; when the inspection procedure 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 parts are welded together by using a flat plate welding technology and flat plates with different strengths, toughness and shapes, and are punched into proper shapes by using punching 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 welding lines formed by the flat plate welding are oblique welding lines (namely welding lines with a certain slope, and the slope of all welding lines is a positive value), so that the conventional automatic detection equipment cannot well meet the effect of detecting the oblique welding lines, and the existing welding part detection equipment also has the problems of easiness in error detection and the like.

The inventor further researches and discovers that, as the current welding seam visual inspection equipment usually adopts a machine vision mode to detect, namely, the welding seam to be detected is compared with welding seam photos meeting the requirements stored in a processor, so as to identify whether the welding seam meets the visual inspection requirements, but for the oblique welding seam formed by flat plate welding, the photographed oblique welding seam is firstly processed into a straight welding seam according to different oblique welding seam slopes, wherein the slopes of the different oblique welding seams are very difficult to extract by the processor, and the slopes of the different oblique welding seams can be accurately extracted by an AI system with a large amount of training, so that the manufacturing cost of the welding piece detection equipment is increased, the equipment is not beneficial to the development of factories, and the problems of poor stability, easy error and the like still exist by utilizing the identification, and the continuous use of factories is not facilitated.

In addition, the machine vision mode is utilized to detect, the precision requirement on the photo shot by the detection unit is higher, and particularly for on-line detection equipment, most of welding detection equipment is supported by the profile construction at present, so that the welding detection equipment is easy to deform when in use and is limited by cost, and a casting can not be adopted to manufacture a machine body, so that the machine body rigidity of the detection equipment is improved, the machine body shakes greatly in the use process, the photo shot by the on-line detection equipment is easy to blur and misplace, and the unstable detection condition is further caused.

It is worth mentioning that the welding seam visual inspection equipment commonly used at present generally needs to move the detection unit along the welding seam direction, and the trend of the welding seam needs to be further analyzed while detecting the quality of the welding seam, so that the calculation amount is large, the operation amount of a processing chip is increased, the manufacturing cost is further improved, the detection is often inaccurate, the alarm such as missing detection and false detection appears, and the speed of manual visual inspection is seriously not even reached.

In addition, for a welded piece formed by a plurality of flat plates through splice welding, welding lines with different slopes need to be continuously detected after entering the welded piece detection equipment, although the starting positions of the welding lines are basically the same in the front-rear direction, the welding lines have different slopes, and the specific position coordinates of the different welding lines in the left-right direction are difficult to determine, so that the calculated amount is difficult to finish through a common machine vision recognition technology, and the use requirement of a factory cannot be met.

Based on this, the inventor of the application developed the welding piece detection device, and the detection component arranged in the welding piece detection device comprises a detection unit and a mark checking unit, wherein the mark checking unit is used for tracking and analyzing the trend and the position of a mark line, and because the welding line is difficult to directly identify by directly using a machine vision identification device, a mark line which is completely parallel to the welding line and has the distance D1 between the two mark lines can be generated beside the welding line to be detected. The method for generating the marking line can be formed by slightly contacting the surface of the welding piece by using a sharp scribing tool, can also be used for directly binding the scribing tool beside a laser welding head, and can generate the marking line when carrying out laser welding. In addition, the detection unit and the mark inspection unit both comprise cameras for extracting images, and a visual recognition algorithm is utilized to detect the quality of the welding seam and the trend of the marking line, and the detection algorithm of the specific welding seam quality, the recognition marking line and the slope algorithm thereof are both in 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 line, the noise generated by the marking line is smaller, the slope and the position of the marking line are easy to recognize through the marking line, and the positions of the marking line and the center of the welding line are always D1, so that the position of the center of the welding line is easy to be deduced.

Controlling the detection unit to correspond to the mark checking unit and the welding line to correspond to the position of the mark line, wherein the position corresponds to the position that if the mark line is positioned on the left side of the welding line, the mark checking unit is 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 openable and closable manner, so that the upper box body has two advantages: the device has the advantages that the rigidity of the whole body can be increased when the detection device is operated, compared with the traditional body built by sectional materials, the device is higher in stability, smaller in deformation, smaller in shaking during operation, and convenient to install and maintain due to the design of the openable and closable structure; and secondly, other limiting components are conveniently arranged in an additional mode and used for limiting the displacement of the welding piece placed in the accommodating cavity.

When the mark checking procedure is carried out, the detection component is controlled to move in the front-back direction, so that the detection unit is positioned 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 moment), then the mark checking unit is suitable for moving synchronously with the detection unit in the left or right direction, the mark line is positioned at the left or right side of the mark checking unit in the left or right direction, the mark checking unit passes through the upper part of the mark line in the moving process, the slope of the mark line is calculated through a visual recognition algorithm, the X-axis coordinate of the starting point of the welding seam is determined, so that the detection unit is positioned 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 welding seam at the moment), and the detection unit can completely capture the position of the starting point by the mark checking unit at the moment, and the next step of the detection procedure can be carried out. In the inspection procedure, the motion of the detection unit is formed by combining the displacement of the detection unit along the left-right direction and the displacement of the detection component along the front-back direction, so that the motion with a certain slope can be formed, and the detection unit is always positioned above the welding line, thereby realizing quick online detection.

It should be noted that in the actual use process, since the same welding piece is provided with a plurality of welding seams with different slopes, after one welding seam is inspected, the inspection assembly can reenter the inspection process, and when the inspection assembly is controlled to move along the front-back direction, the inspection unit is not in a working state, in the process, the welding piece can be propelled by the propulsion device, the detected welding seam leaves the inspection area, the welding seam to be detected enters the inspection area, after the welding seam to be detected completely enters the inspection area, the inspection unit and the inspection unit can synchronously move towards the right, and the inspection unit is in the working state, so that the slope and the position of the marking line can be identified.

Compared with the traditional welding part detection equipment, the detection equipment 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 integration of the detection equipment is improved, the rigidity of the whole detection equipment is effectively improved, the deformation is reduced, and the shaking phenomenon in operation is reduced; (2) The training quantity of the AI model is reduced, different welding lines are not required to be accurately identified by the training model, the position of the welding line and the slope of the welding line can be positioned only by identifying the marking line, the manufacturing cost is lower, the detection of the welding lines with different slopes can be more effectively met, in the online detection process, the algorithm for identifying the marking line operates at a higher speed due to the required corresponding speed, the response speed is also higher, the operation quantity required to be used is smaller, the processing cost of the chip is also lower, a mature low-end chip can be used, and the manufacturing cost is further reduced.

Still preferably, the detection assembly comprises a detection housing, a first movable groove and a second movable groove are respectively arranged in the detection housing along the left-right direction, the notch of the first movable groove and the notch of the second movable groove are respectively arranged downwards, the first movable groove and the notch of the second movable groove are sequentially arranged along the front-back direction, the detection unit and the mark checking unit are respectively arranged in the first movable groove and the second movable groove, and the detection unit and the mark checking unit are arranged in a staggered manner along the left-right direction and are suitable for moving along the left-right direction in the first movable groove and the second movable groove respectively; the welding part detection equipment 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, and the second driving source is two and suitable for driving the detection unit and the mark verification unit to move in the left-right direction respectively;

when the mark checking procedure is carried out, the first driving source is used for controlling the detection assembly to move along the front-back direction, the detection unit is positioned at the initial detection position along the front-back direction, then the second driving source is used for driving the mark checking unit and the detection unit to move, the trend and the position of the welding line are positioned through the mark line, and meanwhile, the distance D2=D1 between the mark checking unit and the detection unit is controlled, so that the detection unit is positioned at the initial detection position along the left-right direction; when the inspection process is performed, the detection unit is suitable for moving according to the trend and the position of the welding line positioned by the inspection unit under the drive of the first drive source and the second drive source, detecting the external welding quality of the welding line, and synchronously moving with the inspection unit.

Further preferably, the second driving source comprises a detection driving source and a label-checking driving source, the detection driving source and the label-checking driving source are suitable for driving the detection unit and the label-checking unit to move along the left-right direction through a ball screw structure respectively, an angular displacement sensor is arranged on the label-checking driving source, and the angular displacement sensor is suitable for detecting the angular displacement of the rotation of the label-checking driving source;

when the mark checking procedure is carried out, the first driving source is used for controlling the detection unit to move along the front-back direction, the detection unit is positioned at the initial detection position in the front-back direction, then the detection unit and the mark checking unit are driven to move through the detection driving source and the mark checking driving source until the mark checking unit is positioned at the zero position in the left-right direction, and meanwhile, the trend and the position of the welding seam are initially positioned according to the angular displacement alpha recorded by the angular displacement sensor and the trend of the mark line recorded by the mark checking unit when the mark checking unit passes through the mark line for the first time; and then enabling the detection driving source and the mark inspection driving source to respectively drive the detection unit and the mark inspection unit to synchronously and reversely move, and accurately positioning the position of the welding seam according to the angular displacement alpha and the mark inspection unit to enable the detection unit to be positioned at an initial detection position in the left-right direction.

Still preferably, a power transmission assembly and a counterweight assembly are respectively arranged at the left side and the right side of the detection assembly, the detection driving source is installed on the power transmission assembly, the detection driving source is in closed-loop control, the power transmission assembly has two working states which are a transmission state and a blocking state respectively, 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 mark inspection 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 balance weight assembly is provided with the mark inspection driving source, the mark inspection driving source is in open loop control, the mark inspection driving source is suitable for independently driving the mark inspection unit to move along the left-right direction, and the balance weight assembly is suitable for balancing the gravity of the power transmission assembly, so that the gravity center of the detection assembly is located in the middle.

Still preferably, the detection unit includes a detection screw shaft, a detection head, and a detection nut, where the detection screw shaft and the detection nut form a ball screw structure, the detection nut is slidably connected with the first movable groove along a left-right direction, the detection driving source is adapted to drive the detection screw shaft to rotate and drive the detection nut to slide along the left-right direction, and the detection head is installed at a bottom of the detection nut and is disposed downward; the mark checking unit comprises a mark checking screw shaft, a mark checking head and a mark checking nut, the mark checking screw shaft and the mark checking nut form a ball screw structure, the mark checking nut is connected with the second movable groove in a sliding mode along the left-right direction, the mark checking driving source is suitable for driving the mark checking screw shaft to rotate and driving the mark checking nut to slide along the left-right direction, and the mark checking head is installed at the bottom of the mark checking nut and is arranged downwards.

Still preferably, the power transmission assembly comprises a power transmission housing, a first gear, a second gear and a power switching gear are installed in the power transmission housing, a first gear shaft is sleeved in the first gear, the first gear is rotatably installed in the power transmission housing 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; the second gear is sleeved with a second gear shaft, 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 mark inspection screw shaft and the mark 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 arranged on the power transmission shell in a matching manner with the first gear shaft and the second gear shaft, and the first gear shaft and the second gear shaft are respectively arranged in the first gear hole and the second gear hole; a sliding groove is arranged between the first gear hole and the second gear hole along an oblique direction, a switching gear shaft is sleeved in the power switching gear, the end part of the switching gear shaft is slidably arranged in the sliding groove, and when the first gear rotates along a clockwise direction, the switching gear shaft is positioned 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 in 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.

Still preferably, the left and right sides of detection component all is provided with the walking subassembly, the holding tank of rectangle has been seted up to walking subassembly bottom, the notch of holding tank sets up downwards, be provided with a plurality of balls rotationally in the holding tank, the bottom detachably of walking subassembly is provided with the bottom plate, the bottom plate is suitable for to seal the holding tank, the holding hole with ball matching has been seted up on the bottom plate in penetrating, the ball rotationally installs in the holding hole, the diameter of ball is d1, the diameter of holding hole is d2, satisfies d1 > d2.

Still preferably, the top of the detection assembly is provided with a mounting plate, the detection assembly is detachably mounted on the mounting plate, two sides of the mounting plate are slidably connected with the upper box body along the front-rear direction, a front-rear displacement nut is mounted on the top of the mounting plate, a front-rear displacement screw shaft is sleeved on the front-rear displacement nut, and the first driving source is suitable for driving the front-rear displacement screw shaft to rotate and driving the front-rear displacement nut to move along the front-rear direction.

Further preferably, a guide post piston is provided on the upper case in a protruding manner in the up-down direction, a guide post cylinder is provided in the lower case in matching with the guide post piston, the guide post piston can move in the up-down direction in the guide post cylinder, and the upper case and the lower case are configured to be openable and closable.

Still preferably, the left and right sides of the lower case body are provided with welding piece passing openings in a penetrating manner in the left and right directions, the welding piece passing openings are communicated with the accommodating cavity, the welding piece to be detected is suitable for entering the detecting device from the welding piece passing opening on one side, and leaving the detecting device from the welding piece passing opening on 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 the sectional materials, the detection equipment disclosed by the invention has the advantages of better integrity, better rigidity, small deformation and smaller shake during operation, reduces the interference of noise points in the machine identification process, and effectively improves the success rate and the stability of detection;

(2) The marking line and the marking verification unit are utilized to conveniently position the welding line, the slope value of the welding line is calculated more accurately, the calculation amount required by a chip is reduced, the defects that the welding line is too many in recognition noise and the welding bias is effectively recognized due to the influence of welding quality are overcome, the recognition accuracy 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 weld showing the location of a mark line and weld.

Fig. 2 is a schematic diagram of an embodiment of the detection device of the present application, showing 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 device of the present application, showing the detection assembly.

FIG. 5 is an exploded view of a 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 label verification unit.

Fig. 7a is a schematic working diagram of an embodiment of the detection device of the present application, showing the detection in a completed state.

Fig. 7b is a schematic working diagram of an embodiment of the detection device of the present application, showing the initial detection position in the front-to-back direction.

Fig. 7c is a schematic operation diagram of an embodiment of the detection device of the present application, showing the initial detection position in the left-right direction.

FIG. 7d is a schematic diagram of the operation of one embodiment of the detection device of the present application, showing the null 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 label verification unit of one embodiment of the detection apparatus of the present application.

Fig. 11 is an isometric view of a detection unit and an inspection unit of one embodiment of the detection apparatus of the present application in another orientation.

Fig. 12 is an exploded view of a 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 transmission state.

Fig. 14 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 blocking state.

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

Fig. 16 is a cross-sectional view of an 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 case; 11. a guide post piston; 2. a lower case; 21. a guide post oil cylinder; 22. an oil cylinder mounting hole; 23. a weld passing port; 3. a detection assembly; 31. a detection unit; 311. detecting a screw shaft; 312. a detection head; 313. detecting a nut; 32. a label checking unit; 321. marking a screw shaft; 322. verifying a mark head; 323. a mark checking nut; 33. a detection housing; 331. a first movable groove; 332. a second movable groove; 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; 362. a receiving hole; 363. a receiving groove; 364. a bottom plate; 37. a mounting plate; 371. a screw shaft is displaced forwards and backwards; 372. a back and forth displacement nut; 4. a receiving chamber; 101. a first driving source; 102. a second driving source; 1021. detecting a driving source; 1022. a label checking driving source; 200. a welding member; 201. welding seams; 202. marking lines.

Detailed Description

The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth terms such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific protection scope of the present application that the device or element referred to must have a specific azimuth configuration and operation, as indicated or implied.

It should be 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 objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present 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 that are expressly listed or inherent to such process, method, article, or apparatus.

At present, the automobile sheet metal parts are welded together by using a flat plate welding technology and flat plates with different strengths, toughness and shapes, and are punched into proper shapes by using punching 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 lines 201 formed by the flat plate welding are oblique welding lines 201 (as shown in fig. 1, namely, the welding lines 201 with a certain slope are shown, and the slopes of all the welding lines 201 are generally positive values), so that the conventional automatic detection equipment cannot well meet the effect of detecting the oblique welding lines 201, and the existing welding part detection equipment also has the problems of easy error in detection and the like.

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

In addition, the precision requirement on the photo shot by the detecting unit 31 is higher, particularly for on-line detecting equipment, most of the welding piece detecting equipment is supported by the sectional materials, so that the welding piece detecting equipment is easy to deform when in use, is limited by cost and cannot adopt castings to manufacture a machine body, the machine body rigidity of the detecting equipment is improved, the machine body shakes greatly in the using process, the photo shot by the on-line detecting equipment is easy to blur and misplace, and the unstable detecting condition is further caused.

It should be noted that, the conventional welding seam visual inspection device generally needs to move the detection unit 31 along the trend of the welding seam 201, and further analyze the trend of the welding seam 201 while detecting the quality of the welding seam 201, so that the calculation amount is large, the operation amount of the processing chip is increased, the manufacturing cost is further increased, the detection is often inaccurate, the alarms such as missed detection and false detection appear, and the speed of manual visual inspection is seriously not even reached.

In addition, for a welded piece 200 formed by a plurality of flat-plate welding, it is necessary to continuously detect the welding lines 201 with different slopes after entering the welded piece detecting device, and although the starting positions of these welding lines 201 are substantially the same in the front-rear direction (i.e., the starting Y-axis coordinates of each welding line 201 in fig. 1), they have different slopes, and it is also difficult to determine the specific position coordinates of different welding lines 201 in the left-right direction (i.e., the starting X-axis coordinates of each welding line 201 in fig. 1), so that such calculation amount is difficult to accomplish by the ordinary machine vision identifying technology, and the use requirement of the factory cannot be satisfied.

Accordingly, the inventors developed a weldment inspection apparatus, an embodiment of which is shown in fig. 1 to 16, comprising an upper case 1 and a lower case 2, the lower case 2 being adapted to be mounted on a base surface, the upper case 1 being openably and closably disposed above the lower case 2, the inner walls of the upper case 1 and the lower case 2 together defining a housing chamber 4, a detection unit 3 being movably disposed in the front-rear direction within the housing chamber 4, a detection unit 31 and a tag inspection unit 32 being movably disposed in the left-right direction on the detection unit 3, a weldment 200 to be inspected being adapted to be placed within the housing chamber 4, the weldment 200 having a weld 201 and a tag line 202 disposed on the weldment 200, the weld 201 and the tag line 202 being both disposed upward, and a distance D1 between the center position of the weld 201 and the tag line 202 in the left-right direction being unchanged (as a solid line in fig. 1 represents the center position of the weld 201, represents the position of the tag line 202), and controlling the detection unit 31 to correspond to the tag inspection unit 32 and the weld 201 in the orientation with the tag line 202, and the distance D2 = D1 in the left-right direction; wherein orientation correspondence means that if the marking line 202 is located on the left side of the weld 201, the marking unit 32 is also located on 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 marking unit 32 is also located on the right side of the detecting 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 verification unit 32 is located on the right side of the detection unit 31 (as shown in FIG. 7 a);

When the label checking process is performed, the detection assembly 3 is controlled to move in the front-back direction (i.e. along the Y-axis direction) so that the detection unit 31 is at the initial detection position in the front-back direction (i.e. along the Y-axis direction), then the label checking unit 32 is suitable for moving with the detection unit 31 in the left or right direction (i.e. along the X-axis direction), the trend and the position of the weld 201 are positioned through the mark line 202, the detection unit 31 is at the initial detection position in the left or right direction (i.e. along the X-axis direction), and the detection unit 31, the label checking unit 32 and the weld 201 are controlled to correspond to the mark line 202 in azimuth, and the distance d2=d1 along the left or 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 to detect the external welding quality of the weld 201.

As shown in fig. 8, when the label checking process is performed, the detecting unit 3 is controlled to move in the front-rear direction (i.e. the Y-axis direction), as shown in fig. 7a, since the detecting unit 31 and the label checking unit 32 are both disposed on the detecting unit 3, when the detecting unit 3 moves in the front-rear direction, the detecting unit 31 and the label checking unit 32 move in the rear direction at the same speed, and it can be understood that the detecting unit 31 is at the initial detecting position in the front-rear direction, that is, the Y-axis coordinate of the position is the same as the Y-axis coordinate of the starting point of the weld 201; the inspection unit 32 and the detection unit 31 are then moved synchronously in the X-axis direction, as shown in fig. 7b, until the inspection unit 32 reaches the start of the marking line 202, i.e. as shown in fig. 7c, at which point the detection unit 31 is in the left-right direction of the start detection position, i.e. the X-axis coordinate of this position is the same as the X-axis coordinate of the start of the weld 201.

In addition, since the detection unit 31 and the label checking unit 32 are manufactured by adopting the camera and matching with the machine vision detection principle, the camera has a certain visual angle, and therefore, the detection unit 31 and the label checking unit 32 do not need to be additionally controlled, the Y-axis coordinates of the weld joint 201 and the label line 202 are not identical, and the label checking and testing procedures can be realized only by ensuring the same X-axis coordinates. In this case, as shown in fig. 7a, the initial detection position of the detection unit 31 in the front-rear direction may be widened to be interpreted that the Y-axis coordinate of the position is equal to the Y-axis coordinate of the start point of the weld bead 201 by a fixed offset distance a (as shown in fig. 7 b), and the size of the fixed offset distance a is required to be changed according to the size of the view angle of the camera, so that it is required to ensure that the head of the weld bead 201 is observed when the detection unit 31 moves along the X-axis.

In addition, since the displacement device for limiting the welding member 200 in the detection process is in the prior art, for example, a movable pressing plate is adopted to limit the welding member 200, which is not described herein.

The welding part detection device developed by the inventor of the application comprises a detection unit 31 and a mark verification unit 32, wherein the mark verification unit 32 is used for tracking and analyzing the trend and the position of a mark line 202, and because the welding line 201 is difficult to directly identify by using a machine vision identification device, a mark line 202 which is completely parallel to the welding line 201 and always has a distance D1 between the two can be generated beside the welding line 201 to be detected. The method for producing the marking line 202 can utilize a sharp scribing tool to slightly contact the surface of the welding piece 200, or can directly bind the scribing tool beside a laser welding head, and produce the marking line 202 while carrying out laser welding, and the scribed marking line 202 is easily covered due to the subsequent paint spraying treatment of the automobile sheet metal, so that the automobile sheet metal shape of the final finished product is not affected. In addition, the detection unit 31 and the label inspection unit 32 both include cameras for extracting images, and detect the quality of the weld 201 and the trend of the marking line 202 by using a visual recognition algorithm, and the detection algorithm of the quality of the weld 201 and the algorithm for recognizing the marking line 202 and the slope thereof are both in the prior art, and will not be described again. Because the marking line 202 is easier to pass through a machine vision recognition algorithm relative to the welding line 201, noise generated by the marking line 202 is smaller, the slope of the marking line 202 and the position of the marking line are easy to recognize through the marking line 202, and the positions of the marking line 202 and the center of the welding line 201 are always D1, so that the position of the center of the welding line 201 is easy to be deduced.

The upper box body 1 can be arranged above the lower box body 2 in an openable and closable manner, so that the two advantages are achieved: the device has the advantages that the rigidity of the whole body can be increased when the detection device is operated, compared with the traditional body built by sectional materials, the device is higher in stability, smaller in deformation, smaller in shaking during operation, and convenient to install and maintain due to the design of the openable and closable structure; secondly, other limiting components are conveniently added for limiting the displacement of the welding piece 200 placed in the accommodating cavity 4.

When the label checking process is performed, the detection assembly 3 is controlled to move in the front-back direction, so that the detection unit 31 is at the front-back direction initial detection position (that is, the Y-axis coordinate of the starting point of the weld bead 201 is equal to the Y-axis coordinate of the position where the detection unit 31 is located at the moment, the fixed offset distance a is reinforced, the size of a can be zero), then the label checking unit 32 is suitable to move synchronously with the detection unit 31 in the left-right direction, and the left-right movement depends on that the label line 202 is located at the left-side or right-side of the label checking unit 32 at the moment (in this specific embodiment, the label line 202 is located at the right-side of the label checking unit 32, as shown in fig. 7b, so that the label checking unit 32 is controlled to move synchronously with the detection unit 31 to the right-side at the same time), during this movement, the label checking unit 32 passes over the label line 202, the slope of the label line 202 is calculated through a visual recognition algorithm, and the X-axis coordinate of the starting point of the weld bead 201 is determined, so that the starting point of the detection unit 31 is located at the left-right direction initial detection position (that the X-axis coordinate of the starting point of the weld bead 201 is identical to the X-axis coordinate of the position where the detection unit 31 is located at the moment, as shown in fig. 7 c), and thus the next step of the label checking unit 31 can be completely captured by the label checking unit 32. 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-rear direction, so that a movement with a certain gradient can be formed, and the detection unit 31 is always located above the weld 201, thereby realizing rapid online detection.

It should be noted that, in the actual use process, since the same welding piece 200 has a plurality of welding seams 201 with different slopes, after one welding seam 201 is inspected, the inspection component 3 will reenter the inspection process, and when the inspection component 3 is controlled to move along the front-back direction, the inspection unit 32 is not in an operating state, in this process, the welding piece 200 may be pushed by the pushing device, so that the inspected welding seam 201 leaves the inspection area, the welding seam 201 to be inspected enters the inspection area, after the welding seam 201 to be inspected completely enters the inspection area, the inspection unit 32 and the inspection unit 31 may be moved synchronously to the right, and the inspection unit 32 is in an operating state, so as to identify the slope and the position of the marking line 202.

Compared with the traditional welding part detection equipment, the detection equipment 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 integration of the detection equipment is increased, the rigidity of the whole detection equipment is effectively improved, and the deformation and the shaking phenomenon in the operation are reduced; (2) The training quantity of the AI model is reduced, different welding lines 201 are not required to be accurately identified by the training model, only the mark line 202 is required to be identified, the position of the welding line 201 and the slope of the welding line 201 can be positioned, the manufacturing cost is lower, the detection of the welding lines 201 with different slopes can be more effectively met, in the online detection process, the algorithm for identifying the mark line 202 operates at a higher speed due to the required corresponding speed, the response speed is also higher, the operation quantity required to be used is smaller, the processing cost of the chip is also reduced, and a mature low-end chip can be used, so that the manufacturing cost is further reduced.

Further preferably, as shown in fig. 5 and 6, the detection assembly 3 includes a detection housing 33, in which a first movable slot 331 and a second movable slot 332 are respectively disposed in a left-right direction in the detection housing 33 (the first movable slot 331 and the second movable slot 332 disposed in the left-right direction, that is, the trend of the first movable slot 331 is in the left-right direction, and the trend of the second movable slot 332 is also in the left-right direction, as shown in fig. 6), the notches of the first movable slot 331 and the second movable slot 332 are disposed downward, and the first movable slot 331 and the second movable slot 332 are sequentially arranged in a front-rear direction, the detection unit 31 and the verification unit 32 are respectively mounted in the first movable slot 331 and the second movable slot 332, and the detection unit 31 and the verification unit 32 are disposed in a dislocation manner in the left-right direction (the dislocation manner in the left-right direction means that the X-axis coordinates of the detection unit 31 and the verification unit 32 are different, it is easy to understand that the difference is D2), and are adapted to move in the left-right direction in the first movable slot 331 and the second movable slot 332, respectively; the weldment inspection apparatus further includes a first driving source 101 and a second driving source 102, the first driving source 101 being adapted to drive the inspection assembly 3 to move in the front-rear direction, the second driving source 102 having two and being adapted to drive the inspection unit 31 and the inspection unit 32 to move in the left-right direction, respectively;

When the label checking procedure is carried out, the first driving source 101 controls the detection assembly 3 to move along the front-back direction, the detection unit 31 is positioned at the initial detection position along the front-back direction, the second driving source 102 then drives the label checking unit 32 and the detection unit 31 to synchronously move, the trend and the position of the welding line 201 are positioned through the marking line 202, and meanwhile, the distance d2=d1 between the label checking unit 32 and the detection unit 31 is controlled, so that the detection unit 31 is positioned at the initial detection position along the left-right direction; when the inspection process is performed, the detection unit 31 is adapted to move according to the trend and position of the weld 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 weld bead 201, and the detection unit 31 moves synchronously with the inspection unit 32.

Since the first movable groove 331 and the second movable groove 332 are sequentially arranged along the front-rear direction, the detecting unit 31 and the label checking unit 32 in the first movable groove 331 and the second movable groove 332 are respectively installed in the front-rear direction and also are arranged in a staggered manner (that is, the Y-axis coordinates of the detecting unit 31 and the label checking unit 32 are different), when the slope is greater than zero for the oblique welding line 201, as shown in fig. 7a to 7d, during the inspection process (that is, as shown in fig. 7 c), since the label checking unit 32 is arranged at the rear side of the detecting unit 31 (that is, the Y-axis coordinates of the label checking unit 32 are smaller than the Y-axis coordinates of the detecting unit 31), during the inspection process (as shown in fig. 7), the label checking unit 32 scans the potential change of the label line 202 first, so that the moving speed of the detecting unit 31 along the X-axis can be changed according to the potential change of the label line 202, thereby always keeping the welding line 201 at a better observation position of the detecting unit 31, effectively improving the stability of the detection, and encountering a more complex welding line 201, such as the welding line 201, and for example, the label checking unit 32 can read the slope of the detecting unit 31 at the position of the detecting unit 31 at a better position of the X-axis change. In this way, the detection unit 31 can be prevented from encountering a change in the slope of the weld 201 or the influence of vibration generated during operation on the detection result, thereby improving the durability of the weldment detection apparatus.

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

when the label checking procedure is carried out, the first driving source 101 is used for controlling the detection unit 31 to move along the front-back direction, the detection unit 31 is positioned at the initial detection position along the front-back direction, then the detection driving source 1021 and the label checking driving source 1022 are used for driving the detection unit 31 and the label checking unit 32 to move until the label checking unit 32 is positioned at the zero position along the left-right direction, the distance between the detection unit 31 and the label checking unit 32 is D2, and meanwhile, the trend and the position of the weld joint 201 are initially positioned according to the angular displacement alpha recorded by the angular displacement sensor and the trend of the label line 202 recorded by the label checking unit 32 when the label checking unit 32 passes through the label line 202 for the first time; subsequently, the detection driving source 1021 and the label verification driving source 1022 are caused to respectively drive the detection unit 31 and the label verification unit 32 to synchronously and reversely move, and the detection unit 31 is caused to be at the initial detection position in the left-right direction according to the angular displacement α and the position of the precisely positioned weld bead 201 of the label verification unit 32. It should be noted that the zero position refers to a side end position of the left-right displacement, that is, a maximum displacement of the calibration unit 32 in the left-right direction.

The detection unit 32 is directly relied on to stop in time when the head position of the marking line 202 is detected so as to meet the detection position of the welding line 201 below the detection unit 31, and the braking process has a certain delay time in the actual use process and can not be timely braked due to the influence of inertia.

Thus, the process is further optimized, and the specific flow chart is shown in fig. 8, and the following steps are performed: (1) The detecting unit 3 moves to the detection initial position in the front-rear direction (as shown in fig. 7 b); (2) The marking unit 32 moves to a zero position in the left-right direction (as shown in fig. 7 d); (3) The detection unit 31 and the verification unit 32 return to the detection initial positions in the left-right direction (as shown in fig. 7 c); (4) starting detection. With this method, when the detecting unit 31 and the marking unit 32 move to the zero position in the left-right direction, the marking unit 32 passes through the marking line 202, and the angular displacement α at this time can be recorded in cooperation with the angular displacement sensor, so that the position of the marking line 202 is approximately calculated, and the position of the weld 201 can be reversely deduced because the distance between the marking line 202 and the weld 201 is kept at D1. And then moves from the null direction to slow down when approaching the approximate position of the marking line 202, thereby accurately positioning the solid marking line 202 and accurately positioning the position of the weld 201. Thereby reducing the frequency of shooting the tag verification unit 32 and the amount of data to be processed, thereby effectively reducing the manufacturing cost of the chip. In step (2), the synchronous movement of the detection unit 31 and the marking unit 32 is not required, but when the marking unit 32 is required to move to the zero position in the left-right direction, the distance between the detection unit 31 and the marking unit 32 is D2 before the start of the inspection process, and d2=d1.

Further preferably, as shown in fig. 6, the left and right sides of the detecting assembly 3 are respectively provided with a power transmission assembly 34 and a counterweight assembly 35, the power transmission assembly 34 is provided with a detecting driving source 1021, the detecting driving source 1021 is in closed loop control, the power transmission assembly 34 has two working states which are respectively a transmission state and a blocking state, when in the transmission state, the power output by the detecting driving source 1021 is suitable for being output through the power transmission assembly 34, so that the detecting unit 31 and the marking unit 32 are driven to move simultaneously; when in a blocking state, the power output by the detection driving source 1021 can only drive the detection unit 31 to move; the balance weight assembly 35 is provided with a mark checking driving source 1022, the mark checking driving source 1022 is in open loop control, the mark checking driving source 1022 is suitable for independently driving the mark checking unit 32 to move along the left-right direction, and the balance weight assembly 35 is suitable for balancing the gravity of the power transmission assembly 34, so that the gravity center of the detection assembly 3 is positioned in the middle. It will be readily appreciated that the power transmission assembly 34, which may have a transmission state and a blocking state, has a variety of different configurations, such as utilizing a variable center of gravity gear to effect power output and shut-off.

In the actual use process, the detection driving source 1021 and the label checking driving source 1022 respectively drive the detection unit 31 and the label checking unit 32 to move, so that the label checking unit 32 is in a zero position in the left-right direction, the distance between the label checking unit 32 and the detection unit 31 is D2, at this time, the power output component is in a blocking state, the label checking driving source 1022 controlled by open loop drives the label checking unit 32 to move until the power output component is in a zero position in the left-right direction (the switch of the label checking driving source 1022 is realized by using a proximity switch), the detection driving source 1021 controlled by closed loop drives the detection unit 31 to move, the distance between the detection unit 31 and the label checking unit 32 is D1, and the label checking driving source 1022 controlled by open loop returns to zero each time, so that the generation of accumulated error is reduced by the detection driving source 1021 controlled by closed loop. Then, the inspection process is performed, and at this time, the power transmission assembly 34 is in a transmission state, and the rotation of the driving source 1021 is detected to simultaneously drive the synchronous movement of the detection unit 31 and the inspection unit 32.

Setting the detection driving source 1021 as closed-loop control and the label-checking driving source 1022 as open-loop control has two beneficial effects: (1) Because the detection unit 31 and the label verification unit 32 need synchronous motion, if the detection driving source 1021 and the label verification driving source 1022 are simultaneously in closed-loop control, the cost is higher, and synchronous control can be performed, a plurality of sensors are required to be externally connected, the cost of a driver and the cost of a controller are higher, the detection driving source 1021 is only in closed-loop control, the label verification driving source 1022 is in open-loop control, the working state is switched by the power transmission component 34, and synchronous motion can be realized, and relative or opposite motion can be realized, so that the label verification process and the label verification process can be effectively completed, and the production cost is greatly reduced; (2) In addition, since the closed-loop control system generally has accumulated errors, and finally causes the problem of excessive errors under a certain number of repetitions, the calibration unit 32 controlled by the open loop returns to the zero position in the left-right direction, so as to re-correct the distance between the detection unit 31 and the calibration unit 32, and keep d2=d1 all the time, so that the accumulated errors are cleared before each calibration procedure starts, and the error reporting condition is reduced.

Further preferably, as shown in fig. 10 and 11, the detection unit 31 includes a detection screw shaft 311, a detection head 312, and a detection nut 313, the detection screw shaft 311 and the detection nut 313 constitute a ball screw structure, and the detection nut 313 is slidably connected with the first movable groove 331 in a left-right direction, and the detection driving source 1021 is adapted to drive the detection screw shaft 311 to rotate and drive the detection nut 313 to slide in the left-right direction, and the detection head 312 is mounted at a bottom of the detection nut 313 and 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 along the left-right direction, and 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 along the left-right direction, and the label checking head 322 is installed at the bottom of the label checking nut 323 and is arranged downwards.

Utilize ball structure drive detecting element 31 and examine mark unit 32 along controlling the direction motion, can accurate control detecting element 31 and examine the distance that mark unit 32 moved along controlling the direction, realize accurate control to promote the durability and the stability of this check out test set.

Still 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 installed in the power transmission housing 344, a first gear shaft is sleeved in the first gear 341, the first gear 341 is rotatably installed in the power transmission housing 344 through the first gear shaft, and both 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 arranged in the power transmission housing 344 through the second gear shaft, two ends of the second gear shaft are respectively connected with the mark inspection screw shaft 321 and the mark inspection driving source 1022, and the inspection 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 provided on the power transmission housing 344 in matching with the first gear shaft and the second gear shaft, respectively, which are installed in the first gear hole 3442 and the second gear hole 3443, respectively; a sliding groove 3441 is arranged between the first gear hole 3442 and the second gear hole 3443 in an inclined direction, a switching gear shaft 3431 is sleeved in the power switching gear 343, the end part of the switching gear shaft 3431 is slidably arranged in the sliding groove 3441, when the first gear 341 rotates in a clockwise direction, the switching gear shaft 3431 is positioned at the bottom of the sliding groove 3441, and at the moment, the first gear 341, the second gear 342 and the power switching gear 343 are meshed 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 only intermeshed with the power switching gear 343, in a blocked 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, it is possible to achieve that the power transmission assembly 34 is in power output and cut-off with a relatively simple structure, as shown in fig. 13, when the detection driving source 1021 rotates clockwise, it will drive the first gear 341 to rotate clockwise, so that the first gear 341, the second gear 342, and the power switching gear 343 are in a transmission state, the first gear 341 rotates clockwise, so as to drive the second gear 342 to rotate clockwise, so that the detection unit 31 and the inspection unit 32 move synchronously (move synchronously to the right as shown in fig. 7c in this specific embodiment), and achieve the inspection procedure; when the detection driving source 1021 rotates anticlockwise, the power transmission assembly 34 is in a blocking state, and at the moment, the detection driving source 1021 rotates anticlockwise and can drive the detection unit 31 to move leftwards, so that the label checking process is realized. 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 and right sides of the detection assembly 3 are provided with a walking assembly 36, the bottom of the walking assembly 36 is provided with a rectangular containing slot 363, the notch of the containing slot 363 is downward, a plurality of balls 361 are rotatably arranged in the containing slot 363, the bottom of the walking assembly 36 is detachably provided with a bottom plate 364, the bottom plate 364 is suitable for closing the containing slot 363, the bottom plate 364 is provided with a containing hole 362 matched with the balls 361 in a penetrating manner, the balls 361 are rotatably arranged in the containing hole 362, the diameter of the balls 361 is d1, the diameter of the containing hole 362 is d2, and d1 > d2 is satisfied.

The walking assembly 36 is arranged, and in the inspection process, the bottom of the ball 361 is made to abut against the top of the welding member 200, so that the friction force applied by the detection assembly 3 in the running process can be reduced, part of gravity can be shared, and the welding member 200 can be assisted to be pressed.

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

The setting of the mounting plate 37 can increase the integrity of the detection assembly 3 and reduce the shake in the movement process, so that the stability and durability of the detection device are improved, and the displacement of the detection assembly 3 in the front-rear direction can be accurately controlled by the front-rear displacement screw shaft 371 and the front-rear displacement nut 372.

Further preferably, as shown in fig. 4, the upper case 1 is provided with a guide pillar piston 11 protruding downward in the up-down direction, the lower case 2 is provided with a guide pillar cylinder 21 matching with the guide pillar piston 11, the guide pillar piston 11 can move in the up-down direction in the guide pillar cylinder 21, and the openable arrangement of the upper case 1 and the lower case 2 is realized. In this particular embodiment, the guide post cylinder 21 is mounted in a cylinder mounting hole 22 provided in the lower case 2 in the up-down direction.

The guide pillar piston 11 is matched with the guide pillar oil cylinder 21, so that openable and ground connection of the upper box body 1 and the lower box body 2 is realized, the stability and durability are improved, and the load capacity is better.

Further preferably, as shown in fig. 2 and 3, the left and right sides of the lower case 2 are perforated with welding passing openings 23 in the left and right direction, the welding passing openings 23 are communicated with the accommodating chamber 4, and the welding 200 to be detected is adapted to enter the detecting apparatus from the welding passing opening 23 on one side and leave the detecting apparatus from the welding passing opening 23 on the other side.

The welding piece passing port 23 is arranged and communicated with the accommodating cavity 4, so that the upper box body 1 and the lower box body 2 do not need to be repeatedly opened in the full-automatic operation process, the detection speed is improved, and the detection cost is reduced.

The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection of the present application is defined by the appended claims and equivalents thereof.

Claims

1. The welding piece 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 manner, an accommodating cavity is defined by the inner walls of the upper box body and the lower box body, a detection component is movably arranged in the accommodating cavity along the front-rear direction, a detection unit and a mark detection unit are movably arranged on the detection component along the left-right direction, a welding piece to be detected is suitable for being placed in the accommodating cavity, a welding seam and a mark line are arranged on the welding piece, the welding seam and the mark line are upwards arranged, the distance D1 between the center position of the welding seam and the mark line along the left-right direction is unchanged, the detection unit corresponds to the mark detection unit and the welding seam along the left-right direction, and the distance D2=D1 between the detection unit and the welding seam along the left-right direction is controlled; the welding part detection equipment 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, and the second driving source is two and suitable for driving the detection unit and the mark verification unit to move in the left-right direction respectively; the second driving source comprises a detection driving source and a mark inspection driving source, the detection driving source and the mark inspection driving source are suitable for driving the detection unit and the mark inspection unit to move along the left-right direction through a ball screw structure respectively, an angular displacement sensor is arranged on the mark inspection driving source, and the angular displacement sensor is suitable for detecting the angular displacement of the rotation of the mark inspection driving source; the detection device comprises a detection unit, a detection driving source, a power transmission assembly, a counterweight assembly, a control unit and a control unit, wherein the left side and the right side of the detection unit are respectively provided with the power transmission assembly and the counterweight assembly, the detection driving source is installed on the power transmission assembly and is in closed-loop control, the power transmission assembly has two working states which are respectively 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 mark detection 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 balance weight assembly is provided with the mark inspection driving source, the mark inspection driving source is in open loop control, the mark inspection driving source is suitable for independently driving the mark inspection unit to move along the left-right direction, and the balance weight assembly is suitable for balancing the gravity of the power transmission assembly, so that the gravity center of the detection assembly is positioned in the middle;

When the mark checking procedure is carried out, the first driving source is used for controlling the detection unit to move along the front-back direction, the detection unit is positioned at the initial detection position in the front-back direction, then the detection unit and the mark checking unit are driven to move through the detection driving source and the mark checking driving source, at the moment, the power transmission assembly is in a blocking state, the mark checking driving source controlled in an open loop is used for driving the mark checking unit to move until the mark checking unit is positioned at the zero position in the left-right direction, the distance between the detection unit and the mark checking unit is controlled to be D2, and meanwhile, the trend and the position of the welding seam are initially positioned according to the angular displacement alpha recorded by the angular displacement sensor and the trend of the mark line recorded by the mark checking unit when the mark checking unit passes through the mark line for the first time; then enabling the detection driving source and the label-checking driving source to respectively drive the detection unit and the label-checking unit to synchronously and reversely move, accurately positioning the position of the welding line according to the angular displacement alpha and the label-checking unit, enabling the detection unit to be at an initial detection position in the left-right direction, controlling the detection unit, the label-checking unit and the welding line to correspond to the orientation of the label line, and enabling the distance D2 = D1 in the left-right direction; when the inspection process is carried out, the power transmission assembly is in a transmission state, and the detection driving source drives the detection unit and the inspection unit to synchronously move, so that 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.

2. The welding part detection device according to claim 1, wherein the detection assembly comprises a detection housing, a first movable groove and a second movable groove are respectively arranged in the detection housing along the left-right direction, the notch of each of the first movable groove and the second movable groove is downward, the first movable groove and the second movable groove are sequentially arranged along the front-back direction, the detection unit and the mark verification unit are respectively arranged in the first movable groove and the second movable groove, and the detection unit and the mark verification unit are arranged in a staggered manner along the left-right direction and are suitable for moving along the left-right direction in the first movable groove and the second movable groove respectively;

3. The weldment inspection apparatus of claim 2, wherein the inspection unit includes an inspection screw shaft, an inspection head and an inspection nut, the inspection screw shaft and the inspection nut forming a ball screw structure, and the inspection nut being slidably connected with the first movable slot in a left-right direction, the inspection drive source being adapted to drive the inspection screw shaft to rotate and the inspection nut to slide in the left-right direction, the inspection head being mounted at a bottom of the inspection nut and disposed downward; the mark checking unit comprises a mark checking screw shaft, a mark checking head and a mark checking nut, the mark checking screw shaft and the mark checking nut form a ball screw structure, the mark checking nut is connected with the second movable groove in a sliding mode along the left-right direction, the mark checking driving source is suitable for driving the mark checking screw shaft to rotate and driving the mark checking nut to slide along the left-right direction, and the mark checking head is installed at the bottom of the mark checking nut and is arranged downwards.

4. The welding piece detection device as claimed in claim 3, wherein the power transmission assembly includes a power transmission housing, a first gear, a second gear and a power switching gear are installed in the power transmission housing, a first gear shaft is sleeved in the first gear, the first gear is rotatably installed in the power transmission housing through the first gear shaft, and both ends of the first gear shaft are respectively connected with the detection screw shaft and the detection driving source; the second gear is sleeved with a second gear shaft, 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 mark inspection screw shaft and the mark 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 arranged on the power transmission shell in a matching manner with the first gear shaft and the second gear shaft, and the first gear shaft and the second gear shaft are respectively arranged in the first gear hole and the second gear hole; a sliding groove is arranged between the first gear hole and the second gear hole along an oblique direction, a switching gear shaft is sleeved in the power switching gear, the end part of the switching gear shaft is slidably arranged in the sliding groove, and when the first gear rotates along a clockwise direction, the switching gear shaft is positioned 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 in 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.

5. The welding piece detection device as claimed in claim 4, wherein the left and right sides of the detection assembly are provided with a traveling assembly, a rectangular accommodating groove is formed in the bottom of the traveling assembly, a notch of the accommodating groove is downward, a plurality of balls are rotatably arranged in the accommodating groove, a bottom plate is detachably arranged at the bottom of the traveling assembly, the bottom plate is suitable for sealing the accommodating groove, an accommodating hole matched with the balls is formed in the bottom plate in a penetrating manner, the balls are rotatably installed in the accommodating hole, the diameter of the balls is d1, and the diameter of the accommodating hole is d2, so that d1 > d2 is satisfied.

6. The weldment inspection apparatus of claim 4 wherein the top of the inspection assembly is provided with a mounting plate, the inspection assembly is removably mounted on the mounting plate, both sides of the mounting plate are slidably connected to the upper case in the front-to-rear direction, a front-to-rear displacement nut is mounted on the top of the mounting plate, the front-to-rear displacement nut is sleeved with a front-to-rear displacement screw shaft, and the first drive source is adapted to drive the front-to-rear displacement screw shaft to rotate and drive the front-to-rear displacement nut to move in the front-to-rear direction.

7. The welding part detection apparatus according to claim 1, wherein a guide pillar piston is provided on the upper case so as to protrude downward in an up-down direction, a guide pillar cylinder is provided in the lower case so as to match with the guide pillar piston, and the guide pillar piston is movable in the up-down direction in the guide pillar cylinder, and is provided so as to be openable and closable between the upper case and the lower case.

8. The welding piece detecting apparatus according to claim 1, wherein the right and left sides of the lower case are provided with welding piece passing openings penetrating in the right and left direction, the welding piece passing openings are communicated with the accommodating chamber, and the welding piece to be detected is adapted to enter the detecting apparatus from the welding piece passing opening on one side and leave the detecting apparatus from the welding piece passing opening on the other side.