CN217120913U

CN217120913U - Automatic thread pitch detection device for AOI (automatic optical inspection)

Info

Publication number: CN217120913U
Application number: CN202123256506.3U
Authority: CN
Inventors: 谢清泉; 林志松
Original assignee: Dong Guan Qinde Metal Products Co ltd
Current assignee: Dong Guan Qinde Metal Products Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-08-05
Anticipated expiration: 2031-12-22

Abstract

The utility model belongs to the technical field of detection equipment, in particular to a thread pitch AOI automatic detection device, which comprises a machine base, a conveying mechanism and an AOI detection mechanism, wherein the AOI detection mechanism comprises an intelligent detection component, an appearance detection component and a positioning rejection component, the intelligent detection component comprises a positioning detection component and an oblique AOI image acquisition and analysis component, the distance between the positioning detection component and the oblique AOI image acquisition and analysis component is positioned above the conveying path of the conveying mechanism, the detection end of the positioning detection component faces the conveying end of the conveying mechanism at an overlooking angle, the detection end of the oblique AOI image acquisition and analysis component faces the conveying end of the conveying mechanism at an oblique overlooking angle, the distance of the thread pitch at the oblique viewing angle is calculated by a method of obliquely setting an AOI visual imaging unit, the detection precision and the measurement efficiency are improved, the automatic detection device also has the functions of appearance detection and automatic rejection of defective products, the functional diversity increases this automatic checkout device's practicality, is favorable to the enterprise to develop.

Description

Automatic thread pitch detection device for AOI (automatic optical inspection)

Technical Field

The utility model belongs to the technical field of check out test set, especially, relate to a screw thread pitch AOI automatic checkout device.

Background

AOI (Automated Optical Inspection) is called automatic Optical Inspection in Chinese, and is a device for inspecting common defects encountered in welding production based on Optical principles. AOI is a new emerging testing technology, but the development is rapid, and AOI testing equipment is released by many manufacturers. During automatic detection, the machine automatically scans the PCB through the camera, acquires images, compares the tested welding spots with qualified parameters in the database, inspects the defects on the PCB through image processing, and displays/marks the defects through a display or an automatic mark for repair personnel to repair.

Among the hardware fitting, mostly be threaded connection on the equipment, threaded connection structure needs the accurate two sets of screw thread mutual adaptation of pitch just can realize stable connection, in hardware fitting's course of working, the tapping effect of the different periods of tapping equipment is different, and there is size or material error in different hardware fitting, the screw thread of different pitches can be produced to the hardware fitting processing probability that is great for different to same tapping equipment, the pitch is beyond the unable threaded connection structure that forms of screw thread of default, therefore traditional hardware fitting screw thread pitch needs to detect and rejects defective products.

Among the prior art, screw thread pitch detects the process and generally detects through slide caliper rule by manual work, efficiency is extremely low, slide caliper rule is possible to produce the error in used repeatedly process, lead to measuring result inaccurate, in order to improve and detect accurate nature, people carry out the screw thread through quadratic element location visual detection structure and detect, but this detection structure is removed by manual drive straight line module and is carried out the camera location and take notes detection effect, detection speed is still very slow, detection efficiency is still very low, be unfavorable for the enterprise development, and when the screw thread pitch of hole is measured to needs, still need dissect the work piece and measure, only can the sampling test, the testing result reference value is very low, be unfavorable for the enterprise development.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a screw thread pitch AOI automatic checkout device, the screw thread pitch that aims at solving among the prior art detects the process by manual work, and the measuring result precision is low, and the reference value is low, influences measurement of efficiency, is unfavorable for the technical problem of enterprise's development.

In order to achieve the above object, an embodiment of the present invention provides an automatic thread pitch detection device for AOI, which includes a machine base, a conveying mechanism and an AOI detection mechanism, wherein the conveying mechanism is disposed on the machine base and is used for detecting a workpiece to be detected having a threaded structure; the AOI detection mechanism comprises an intelligent detection assembly, an appearance detection assembly and a positioning rejection assembly which are sequentially arranged along the conveying direction of the conveying mechanism, the intelligent detection assembly is used for measuring the thread pitch length, the appearance detection assembly is used for detecting the appearance integrity of a workpiece, and the positioning rejection assembly rejects defective products to the outer side of the conveying mechanism according to the detection results of the intelligent detection assembly and the appearance detection assembly; the intelligent detection assembly comprises a positioning detection component and an oblique AOI image acquisition and analysis component, the positioning detection component and the oblique AOI image acquisition and analysis component are located above a conveying path of the conveying mechanism, the detection end of the positioning detection component faces the conveying end of the conveying mechanism at an overlooking angle, and the detection end of the oblique AOI image acquisition and analysis component faces the conveying end of the conveying mechanism at an inclined overlooking angle.

Optionally, the AOI detection mechanism further includes a first positioning component, the first positioning component is disposed on the base and located on one side of the conveying mechanism, the positioning detection component, the oblique AOI image acquisition and analysis component, and the appearance detection component are disposed at an output end of the first positioning component, and the first positioning component can drive the positioning detection component, the oblique AOI image acquisition and analysis component, and the appearance detection component to make X, Y, Z three-axis linear motion relative to the conveying end of the conveying mechanism.

Optionally, the first positioning component includes an X-axis linear module, a Y-axis linear module, and a Z-axis linear module, the X-axis linear module is disposed on the base along a direction of extension of a conveying path of the conveying mechanism and located at one side of the conveying mechanism, the Y-axis linear module is disposed at an output end of the X-axis linear module, an end of the Y-axis linear module extends in a direction away from the base, the Z-axis linear module is fixedly disposed at an output end of the Y-axis linear module, and an end of the Z-axis linear module extends to a position above the conveying path of the conveying mechanism.

Optionally, the output of Z axle straight line module is provided with the mounting panel, the fixed setting of location detection part is in on the mounting panel, the AOI image of squinting acquire analysis part and rotate to be connected on the mounting panel, AOI image of squinting acquire analysis part and pass through the fixed locking of a retaining member and be in on the mounting panel.

Optionally, the number of the first positioning components is two, two sets of the first positioning components are sequentially arranged on the base along the conveying direction of the conveying mechanism, the positioning detection component and the oblique AOI image acquisition analysis component are arranged at one set of the output end of the first positioning component, and the appearance detection component is fixedly arranged at the other set of the output end of the first positioning component.

Optionally, the positioning and rejecting assembly comprises an identification component, a mounting rack, a second positioning component and a material taking component, the mounting rack is arranged on the base, the upper end of the mounting rack spans over the conveying path of the conveying mechanism, the second positioning component is fixedly arranged on the mounting rack, the moving path of the output end of the second positioning component is vertical to the conveying path of the conveying mechanism, the output end of the material taking component is fixedly arranged at the output end of the second positioning component, the output end of the material taking component can extend to the conveying end of the conveying mechanism to contact with a workpiece, the identification component is fixedly arranged on the machine base and located on one side of the conveying mechanism, and the identification end of the identification component faces towards the conveying path of the conveying mechanism in a overlooking mode and is used for acquiring defective workpiece position information detected by the appearance detection component and the intelligent detection component.

Optionally, the identification component includes a vision acquisition unit and a support frame, the support frame is fixedly arranged on the base, the upper end of the support frame is bent towards the conveying path direction of the conveying mechanism and extends, and the vision acquisition unit is fixedly arranged at the bent end of the support frame.

Optionally, the mounting bracket is of a portal frame-shaped structure, the second positioning part is fixedly arranged on a cross beam of the mounting bracket, the second positioning part comprises a material-removing linear module and a telescopic unit, the material-removing linear module is fixedly laid on the cross beam of the mounting bracket, the telescopic unit is fixedly arranged at the output end of the material-removing linear module, and the material-removing part is fixedly arranged at the output end of the telescopic unit.

Optionally, the material taking component comprises an extension frame, an adsorption unit and a material carrying box, the material carrying box is fixedly arranged at the output end of the second fixed component, the adsorption unit is fixedly arranged at the end part of the extension frame far away from the second positioning component, and the adsorption unit can move back and forth between the material carrying box and the upper part of the conveying path of the conveying mechanism along with the extension frame through the driving of the second positioning component.

Optionally, conveying mechanism includes sharp conveying module and spacing subassembly, sharp conveying module is fixed to be set up on the frame, the delivery end of sharp conveying module passes through in proper order intelligent detection subassembly outward appearance detection subassembly with the subassembly is rejected in the location, spacing subassembly sets up on the sharp conveying module, the output of spacing subassembly can extend to the delivery end of sharp conveying module just is used for pressing from both sides tight spacing warp the sharp conveying module drive and extremely intelligent detection subassembly outward appearance detection subassembly or the work piece on the subassembly is rejected in the location.

Optionally, the conveying end of the linear conveying module is provided with a limiting groove, the conveying mechanism further comprises a limiting jig, the limiting jig is connected in the limiting groove in a sliding mode and used for loading a workpiece to be detected, and the output end of the limiting assembly can drive the limiting jig to move and abut against the inner wall of the limiting groove.

The embodiment of the utility model provides an above-mentioned one or more technical scheme among the thread pitch AOI automatic checkout device have one of following technological effect at least: the method comprises the steps that a workpiece to be detected is placed at the output end of a conveying mechanism, the conveying mechanism drives the workpiece to be detected to sequentially pass through an intelligent detection assembly, an appearance detection assembly and a positioning rejection assembly, the output end of the positioning detection assembly moves along a preset path, after the workpiece to be detected is identified, an oblique AOI image acquisition and analysis assembly carries out tooth distance measurement on a target workpiece, when the workpiece to be detected is conveyed through the appearance detection assembly through the conveying mechanism, the appearance detection assembly detects the appearance of the workpiece to be detected, the oblique AOI image acquisition and analysis assembly and the appearance detection assembly send detection results to the positioning rejection assembly, and the output end of the positioning rejection assembly moves to a defective workpiece and clamps the defective workpiece to leave the conveying mechanism; compared with the traditional thread pitch detection process that the thread detection is carried out through a quadratic element positioning visual detection structure, the detection structure carries out camera positioning and records the detection effect by manually driving a linear module to move, the detection speed is very low, the detection efficiency is very low, the development of enterprises is not facilitated, and when the thread pitch of an inner hole needs to be measured, a workpiece needs to be cut for measurement, only sampling detection can be carried out, the reference value of the detection result is very low, and the development of enterprises is not facilitated, simultaneously, this automatic checkout device still attaches the function that outward appearance detected and rejected the defective products automatically, and functional diversity, and then increase this automatic checkout device's practicality, be favorable to the enterprise development.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic structural diagram of the automatic thread pitch detection device provided by the embodiment of the present invention.

Fig. 2 is a side view of the automatic thread pitch detection apparatus AOI of fig. 1.

Fig. 3 is an enlarged view of a in fig. 1.

Fig. 4 is an enlarged view of B in fig. 1.

Wherein, in the figures, the respective reference numerals:

10-machine base 40-conveying mechanism 20-AOI detection mechanism

21-intelligent detection assembly 22-appearance detection assembly 24-positioning rejection assembly

23-first positioning part 211-positioning detection part 31-blanking table

32-belt conveyor 231-X-axis linear module 232-Y-axis linear module

233-Z-axis linear module 241-identification part 242-mounting frame

243-second positioning component 244-material taking component 245-backlight lamp

2411 visual acquisition unit 2431 material rejecting linear module 2412 supporting frame

2432 telescopic unit 2441 extension rack 2442 adsorption unit

2443 Loading box 41 linear conveying module 42 limiting component

43-ribs 212-oblique AOI image acquisition and analysis component.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-4 are exemplary and intended to be used to illustrate embodiments of the present invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1 to 4, there is provided an automatic thread pitch detection apparatus for AOI, including a machine base 10, a conveying mechanism 40 and an AOI detection mechanism 20, wherein the conveying mechanism 40 is disposed on the machine base 10 and is used for a workpiece to be detected having a thread structure; the AOI detection mechanism 20 comprises an intelligent detection assembly 21, an appearance detection assembly 22 and a positioning rejection assembly 24 which are sequentially arranged along the conveying direction of the conveying mechanism 40, wherein the intelligent detection assembly 21 is used for measuring the thread pitch length, the appearance detection assembly 22 is used for detecting the appearance integrity of a workpiece, and the positioning rejection assembly 24 rejects defective products to the outer side of the conveying mechanism 40 according to the detection results of the intelligent detection assembly 21 and the appearance detection assembly 22; wherein, the intelligent detection assembly 21 comprises a positioning detection component 211 and an oblique AOI image acquisition and analysis component 212, the positioning detection component 211 and the oblique AOI image acquisition and analysis component 212 are located above the conveying path of the conveying mechanism 40, the detection end of the positioning detection component 211 faces the conveying end of the conveying mechanism 40 at a top view angle, and the detection end of the oblique AOI image acquisition and analysis component 212 faces the conveying end of the conveying mechanism 40 at an oblique top view angle.

As shown in fig. 1-2, in this embodiment, the end of the machine base 10 is provided with a material receiving mechanism 30, the material receiving mechanism 30 includes a material discharging table 31 and a belt conveyor 32, the material discharging table 31 is disposed on one side of the machine base 10, the belt conveyor 32 is fixed to be disposed on the material discharging table 31, the belt conveyor 32 is connected with the output end of the conveying mechanism 40, and the good work pieces output by the conveying mechanism 40 are moved to the belt conveyor 32 so as to be discharged and collected by an operator.

Specifically, a workpiece to be detected is placed at an output end of the conveying mechanism 40, the conveying mechanism 40 drives the workpiece to be detected to sequentially pass through the intelligent detection assembly 21, the appearance detection assembly 22 and the positioning rejection assembly 24, the output end of the positioning detection assembly 211 moves along a preset path, after the workpiece to be detected is identified, the oblique-view AOI image acquisition and analysis assembly 212 performs tooth pitch measurement on a target workpiece, when the workpiece to be detected is conveyed through the appearance detection assembly 22 by the conveying mechanism 40, the appearance of the workpiece to be detected is detected by the appearance detection assembly 22, the oblique-view AOI image acquisition and analysis assembly 212 and the appearance detection assembly 22 send detection results to the positioning rejection assembly 24, and the output end of the positioning rejection assembly 24 moves to a defective workpiece and clamps the defective workpiece to leave the conveying mechanism 40; compared with the traditional thread pitch detection process that thread detection is carried out through a quadratic element positioning visual detection structure, the detection structure is driven by a manual to move a linear module to carry out camera positioning and record the detection effect, the detection speed is very low, the detection efficiency is very low, the development of enterprises is not facilitated, and when the thread pitch of an inner hole needs to be measured, a workpiece needs to be cut for measurement, only sampling detection can be carried out, the reference value of the detection result is very low, and the development of the enterprises is not facilitated, simultaneously, this automatic checkout device still attaches the function that outward appearance detected and rejected the defective products automatically, and functional diversity, and then increase this automatic checkout device's practicality, be favorable to the enterprise development.

As shown in fig. 1-2, in another embodiment of the present invention, the AOI detection mechanism 20 further includes a first positioning component 23, the first positioning component 23 is disposed on the frame 10 and located on one side of the conveying mechanism 40, the positioning detection component 211, the oblique AOI image acquisition and analysis component 212 and the appearance detection component 22 are disposed at an output end of the first positioning component 23, the first positioning component 23 can drive the positioning detection component 211, the oblique AOI image acquisition and analysis component 212 and the appearance detection component 22 to make X, Y, Z three-axis linear motion at the conveying end of the conveying mechanism 40, and the three-axis linear positioning structure is favorable for improving the position accuracy of the detection component.

As shown in fig. 1-2 and 4, in another embodiment of the present invention, the first positioning component 23 includes an X-axis linear module 231, a Y-axis linear module 232 and a Z-axis linear module 233, the X-axis linear module 231 is disposed on the frame 10 along the extending direction of the conveying path of the conveying mechanism 40 and is located at one side of the conveying mechanism 40, the Y-axis linear module 232 is disposed at the output end of the X-axis linear module 231, the end of the Y-axis linear module 232 extends away from the frame 10, the Z-axis linear module 233 is fixedly disposed at the output end of the Y-axis linear module 232, the end of the Z-axis linear module 233 extends to the upper side of the conveying path of the conveying mechanism 40, in this embodiment, all modules among the X-axis linear module 231, the Y-axis linear module 232 and the Z-axis are linear sliding tables, specifically, the Y-axis linear module 232 is connected to the moving seat of the X-axis linear module 231 through a supporting seat, the supporting seat is higher than the conveying path of the conveying mechanism 40, and the Y-axis linear module 232 is fixedly disposed at the top end of the supporting seat.

As shown in fig. 4, in another embodiment of the present invention, the output end of the Z-axis linear module 233 is provided with a mounting plate, the positioning detection component 211 is fixed to be set on the mounting plate, the oblique AOI image acquisition analysis component 212 is rotated to be connected on the mounting plate, the oblique AOI image acquisition analysis component 212 is fixed to be locked on the mounting plate through a locking component, the locking component is a pre-tightening screw, the oblique AOI image acquisition analysis component 212 includes an AOI optical detector and a connecting plate, the connecting plate is rotated to be connected on the mounting plate, the AOI optical detector is fixed to be set on the connecting plate, the connecting plate is rotated relative to the mounting plate, the output end of the AOI optical detector is driven to rotate and deflect to a preset angle, and the connecting plate is fixed to be locked on the mounting plate through the pre-tightening screw.

As shown in fig. 1, in another embodiment of the present invention, the number of the first positioning components 23 is two, two sets of the first positioning components 23 are sequentially disposed on the machine base 10 along the conveying direction of the conveying mechanism 40, the positioning detection component 211 and the AOI image acquisition and analysis component 212 are disposed at the output end of one set of the first positioning components 23, the appearance detection component is fixedly disposed at the output end of the other set of the first positioning components 23, and in this embodiment, the intelligent detection component and the appearance detection component are sequentially disposed on the corresponding first positioning components 23 along the moving direction of the workpiece.

As shown in fig. 1-2 and 3, in another embodiment of the present invention, the positioning and removing assembly 24 includes an identification component 241, a mounting frame 242, a second positioning component 243 and a material taking component 244, the mounting frame 242 is disposed on the base 10, an upper end of the mounting frame 242 spans above a conveying path of the conveying mechanism 40, the second positioning component 243 is fixedly disposed on the mounting frame 242, an output end moving path of the second positioning component 243 is perpendicular to the conveying path of the conveying mechanism 40, an output end of the material taking component 244 is fixedly disposed at an output end of the second positioning component 243, the output end of the material taking component 244 can extend to the conveying end of the conveying mechanism 40 to contact a workpiece, the identification component 241 is fixedly disposed on the base 10 and located at one side of the conveying mechanism 40, and the identification end of the identification component 241 overlooks the conveying path toward the conveying mechanism 40 and is used for obtaining the workpiece passing through the conveying path of the conveying mechanism 40 In the present embodiment, the identifying means 241 further includes a backlight 245, and the backlight 245 is disposed between the conveying path of the conveying mechanism 40 and the output end of the second positioning means 243 and is used for increasing the brightness of the conveying end of the conveying mechanism 40.

As shown in fig. 1-2 and fig. 3, in another embodiment of the present invention, the identification component 241 includes a vision obtaining unit 2411 and a supporting frame 2412, the supporting frame 2412 is fixedly disposed on the base 10, the upper end of the supporting frame 2412 is bent toward the conveying path of the conveying mechanism 40 and extends, the vision obtaining unit 2411 is fixedly disposed at the bent end of the supporting frame 2412, the vision obtaining unit 2411 is a CCD industrial camera, in this embodiment, the number of the vision obtaining units 2411 is two, and the vision obtaining units 2411 are disposed in parallel on the supporting frame 2412 to enlarge the visual field of the vision obtaining unit 2411 and prevent missing inspection.

As shown in fig. 1-2 and 3, in another embodiment of the present invention, the mounting frame 242 is a portal frame-shaped structure, the second positioning member 243 is fixedly disposed on the cross beam of the mounting frame 242, the second positioning member 243 includes a material picking linear module 2431 and a telescopic unit 2432, the material picking linear module 2431 is fixedly laid on the cross beam of the mounting frame 242, the telescopic unit 2432 is fixedly disposed at the output end of the material picking linear module 2431, the material picking member 244 is fixedly disposed at the output end of the telescopic unit 2432, the material picking linear module 2431 is a linear sliding table, the telescopic unit 2432 is an air cylinder, and the output end moving direction of the telescopic unit 2432 is perpendicular to the moving direction of the material picking linear module 2431.

As shown in fig. 1 to 2 and 3, in another embodiment of the present invention, the material taking component 244 includes an extension frame 2441, an absorption unit 2442 and a material loading box 2443, the material loading box 2443 is fixedly disposed at the output end of the second fixed component, the absorption unit 2442 is fixedly disposed at the end of the extension frame 2441 far from the second fixed component 243, the absorption unit 2442 is driven by the extension frame 2441 through the second fixed component 243 to be capable of moving back and forth between the material loading box 2443 and the upper part of the conveying path of the conveying mechanism 40, in this embodiment, the extension frame 2441 includes an X section, a Y section and a Z section, one end of the X section is fixedly connected with the moving end of the picking straight line module 2431 and is disposed along the moving direction of the picking straight module 2431, the expansion unit 2432 is fixedly disposed at the end of the X section far from the moving end of the picking straight module 2431, the Z section sets up the telescopic link of flexible unit 2432 and the flexible direction setting along the telescopic link, the institute the Y section sets up the tip of telescopic link is kept away from to the Z section, the Y section extends along the horizontal direction, it is fixed to set up to adsorb unit 2442 on the Y section, it is the air cock to adsorb unit 2442, adsorb unit 2442 and outside negative pressure device's output pipe connection.

As shown in fig. 1-2, in another embodiment of the present invention, the conveying mechanism 40 includes a linear conveying module 41 and a limiting component 42, the linear conveying module 41 is fixed to be set on the base 10, the conveying end of the linear conveying module 41 passes through the intelligent detecting component 21, the appearance detecting component 22 and the positioning eliminating component 24 in sequence, the limiting component 42 is set on the linear conveying module 41, the output end of the limiting component 42 can extend to the conveying end of the linear conveying module 41 and is used for clamping the limiting end of the linear conveying module 41, the linear conveying module 41 is driven to reach the intelligent detecting component 21, the appearance detecting component 22 or the workpiece on the positioning eliminating component 24, in this embodiment, the linear conveying module 41 is a belt conveying structure.

As shown in fig. 1-2, in another embodiment of the present invention, the conveying end of the linear conveying module 41 is provided with a limiting groove, the conveying mechanism 40 further comprises a limiting jig slidably connected in the limiting groove, the limiting jig is used for loading a workpiece to be detected, the output end of the limiting assembly 42 can drive the limiting jig to move and abut on the inner wall of the limiting groove, specifically, the belt of the linear conveying module 41 is provided with a protruding rib 43 along the moving direction of the workpiece, the belt of the linear conveying module 41 is provided with a plurality of sets of ribs arranged at intervals perpendicular to the protruding rib 43, the number of the limiting grooves is multiple sets, the plurality of sets of limiting grooves are formed between the protruding rib 43 and the rib, the limiting assembly 42 comprises a pushing member and a moving plate, the pushing member is arranged at the end of the body of the linear conveying module 41 away from the protruding rib 43, the movable plate is arranged at the output end of the pushing piece, when a workpiece located in the limiting groove moves to the output end of the preset detection assembly, the pushing piece drives the movable plate to abut against the edge of the limiting jig and is matched with the convex rib 43 to clamp and position the limiting jig, deviation vibration of the workpiece is prevented, detection accuracy is improved, and the pushing piece is an air cylinder.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A thread pitch AOI automatic detection device is characterized by comprising:

a machine base;

the conveying mechanism is arranged on the base and is used for a workpiece to be detected with a threaded structure;

the AOI detection mechanism comprises an intelligent detection assembly, an appearance detection assembly and a positioning rejection assembly which are sequentially arranged along the conveying direction of the conveying mechanism, wherein the intelligent detection assembly is used for measuring the thread pitch length, the appearance detection assembly is used for detecting the appearance integrity of a workpiece, and the positioning rejection assembly rejects defective products to the outer side of the conveying mechanism according to the detection results of the intelligent detection assembly and the appearance detection assembly;

the intelligent detection assembly comprises a positioning detection component and an oblique AOI image acquisition and analysis component, the positioning detection component and the oblique AOI image acquisition and analysis component are located above a conveying path of the conveying mechanism, the detection end of the positioning detection component faces the conveying end of the conveying mechanism at an overlooking angle, and the detection end of the oblique AOI image acquisition and analysis component faces the conveying end of the conveying mechanism at an inclined overlooking angle.

2. The automatic thread pitch detection device according to claim 1, wherein: the AOI detection mechanism further comprises a first positioning part, the first positioning part is arranged on the base and located on one side of the conveying mechanism, the positioning detection part, the oblique AOI image acquisition analysis part and the appearance detection assembly are all arranged at the output end of the first positioning part, and the first positioning part can drive the positioning detection part, the oblique AOI image acquisition analysis part and the appearance detection assembly to make X, Y, Z three-axis linear motion relative to the conveying end of the conveying mechanism.

3. The automatic thread pitch detection device according to claim 2, wherein: first locating part includes X axle sharp module, Y axle sharp module and Z axle sharp module, X axle sharp module is followed conveying mechanism's conveying path extending direction sets up on the frame and be located conveying mechanism's one side, Y axle sharp module sets up the output of X axle sharp module, the tip of Y axle sharp module dorsad the direction of frame extends the setting, Z axle sharp module is fixed to be set up the output of Y axle sharp module, the tip of Z axle sharp module extends to conveying mechanism's conveying path's top.

4. The automatic thread pitch detection device according to claim 2, wherein: the quantity of first locating component is two sets of, and is two sets of first locating component is followed conveying mechanism's direction of delivery sets gradually on the frame, location detection component with squint AOI image acquisition analysis part sets up one of them a set of first locating component's output, the fixed setting of outward appearance determine module is in another group first locating component's output.

5. The automatic thread pitch detection device according to claim 1, wherein: the positioning and removing assembly comprises an identification component, a mounting rack, a second positioning component and a material taking component, the mounting rack is arranged on the machine base, the upper end of the mounting frame spans over the conveying path of the conveying mechanism, the second positioning component is fixedly arranged on the mounting frame, the moving path of the output end of the second positioning component is vertical to the conveying path of the conveying mechanism, the output end of the material taking component is fixedly arranged at the output end of the second positioning component, the output end of the take-off component can extend to the delivery end of the delivery mechanism to contact the workpiece, the identification component is fixedly arranged on the machine base and located on one side of the conveying mechanism, and the identification end of the identification component faces towards the conveying path of the conveying mechanism in a overlooking mode and is used for acquiring defective workpiece position information detected by the appearance detection component and the intelligent detection component.

6. The automatic thread pitch detection device according to claim 5, wherein: the identification component comprises a vision acquisition unit and a support frame, the support frame is fixedly arranged on the base, the upper end of the support frame is bent towards the conveying path direction of the conveying mechanism and extends, and the vision acquisition unit is fixedly arranged at the bent end of the support frame.

7. The automatic thread pitch detection device according to claim 5, wherein: the mounting bracket is of a portal frame-shaped structure, the second positioning part is fixedly arranged on a cross beam of the mounting bracket, the second positioning part comprises a material-removing linear module and a telescopic unit, the material-removing linear module is fixedly laid on the cross beam of the mounting bracket, the telescopic unit is fixedly arranged at the output end of the material-removing linear module, and the material-removing part is fixedly arranged at the output end of the telescopic unit.

8. The automatic thread pitch detection device according to claim 5, wherein: get the material part including extending frame, adsorption element and year magazine, the fixed setting of magazine is in the output of the second part is decided, adsorption element is fixed to be set up extend the frame and keep away from the tip of second positioning element, adsorption element follows extend the frame warp the drive of second positioning element can reciprocating motion be in the magazine with between the top of conveying mechanism's conveying path.

9. The automatic thread pitch detection device according to claim 1, wherein: conveying mechanism includes sharp conveying module and spacing subassembly, sharp conveying module is fixed to be set up on the frame, the delivery end of sharp conveying module passes through in proper order intelligent detection subassembly outward appearance detection subassembly with the subassembly is rejected in the location, spacing subassembly sets up on the sharp conveying module, the output of spacing subassembly can extend to the delivery end of sharp conveying module just is used for pressing from both sides tight spacing warp the sharp conveying module drive and extremely intelligent detection subassembly outward appearance detection subassembly or the work piece on the subassembly is rejected in the location.

10. The automatic thread pitch detection device according to claim 9, wherein: the conveying end of the linear conveying module is provided with a limiting groove, the conveying mechanism further comprises a limiting jig, the limiting jig is connected in the limiting groove in a sliding mode and used for loading a workpiece to be detected, and the output end of the limiting assembly can drive the limiting jig to move and abut against the inner wall of the limiting groove.