阅读说明：本技术 一种圆柱形工件视觉外观检测装置 (Visual appearance detection device for cylindrical workpiece ) 是由 陈金贵 黄功根 于 2019-10-10 设计创作，主要内容包括：本发明涉及一种圆柱形工件视觉外观检测装置,可包括倍速链机构、第一端面外观检测机构、第二端面外观检测机构、外圆外观检测机构、推料机构、有料检测光电传感器、同步光电传感器及与其电连接的控制系统,倍速链机构包括滚轮,滚轮上具有刻槽,刻槽从滚轮的一端螺旋延伸一圈到另一端,第一端面外观检测机构和第二端面外观检测机构的摄像头分别安装在倍速链机构的两侧,外圆外观检测机构的摄像头安装在倍速链机构的上方,推料机构根据控制系统的检测结果将检测合格的圆柱形工件从倍速链机构推到合格品收料机构上,有料检测光电传感器安装在倍速链机构的进料端并与同步光电传感器相互配合以确定圆柱形工件的当前位置。(The invention relates to a visual appearance detection device for a cylindrical workpiece, which comprises a speed multiplying chain mechanism, a first end surface appearance detection mechanism, a second end surface appearance detection mechanism and an excircle appearance detection mechanism, the pushing equipment, there is the material to detect photoelectric sensor, synchronous photoelectric sensor reaches the control system who is connected with it electricity, doubly fast chain mechanism includes the gyro wheel, the inslot has on the gyro wheel, the inslot extends the round to the other end from the one end spiral of gyro wheel, first terminal surface outward appearance detection mechanism and second terminal surface outward appearance detection mechanism's camera are installed respectively in doubly fast chain mechanism's both sides, excircle outward appearance detection mechanism's camera is installed in doubly fast chain mechanism's top, pushing equipment pushes away qualified product receiving agencies from doubly fast chain mechanism with detecting qualified cylindrical work piece according to control system's testing result, there is the material to detect photoelectric sensor and install the feed end at doubly fast chain mechanism and mutually support with synchronous photoelectric sensor in order to confirm cylindrical work piece's current position.)

1. A visual appearance detection device for a cylindrical workpiece is characterized by comprising a speed doubling chain mechanism, a first end surface appearance detection mechanism, a second end surface appearance detection mechanism, an excircle appearance detection mechanism, a material pushing mechanism, a material detection photoelectric sensor, a synchronous photoelectric sensor and a control system electrically connected with the synchronous photoelectric sensor, wherein the speed doubling chain mechanism comprises a roller for conveying the cylindrical workpiece, the roller is provided with a notch, the notch extends from one end of the roller to the other end in a spiral manner, cameras of the first end surface appearance detection mechanism and the second end surface appearance detection mechanism are respectively arranged on two sides of the speed doubling chain mechanism and are used for shooting the appearances of two end surfaces of the cylindrical workpiece and conveying the two end surfaces to the control system, the camera of the excircle appearance detection mechanism is arranged above the speed doubling chain mechanism and is used for shooting the excircle appearance of the cylindrical workpiece and conveying the excircle appearance to the control system, the material pushing mechanism pushes qualified cylindrical workpieces to the qualified product receiving mechanism from the speed-multiplying chain mechanism according to the detection result of the control system, and the material detection photoelectric sensor is arranged at the feeding end of the speed-multiplying chain mechanism and is matched with the synchronous photoelectric sensor to determine the current position of the cylindrical workpieces.

2. The cylindrical workpiece visual appearance inspection device of claim 1, wherein the cylindrical appearance inspection mechanism is disposed between the first end face appearance inspection mechanism and the second end face appearance inspection mechanism.

3. The apparatus for inspecting the visual appearance of a cylindrical workpiece according to claim 1, wherein the synchronous photoelectric sensor is a groove-type photoelectric sensor which is fitted to a disk having a notch mounted on a rotating shaft of the double speed chain mechanism.

4. The cylindrical workpiece visual appearance inspection apparatus of claim 1, wherein the cylindrical appearance inspection mechanism comprises a coaxial light source and a dome light source, the coaxial light source being disposed between the camera of the cylindrical appearance inspection mechanism and the dome light source.

5. The apparatus for inspecting visual appearance of cylindrical workpiece according to claim 1, wherein a light shielding plate is provided on the side of said speed multiplying chain mechanism opposite to the cameras of said first and second end face appearance inspecting mechanisms.

6. The cylindrical workpiece visual appearance inspection device of claim 1, wherein the mounting positions of the cameras of the first end surface appearance inspection mechanism and the second end surface appearance inspection mechanism are adjustable.

7. The cylindrical workpiece visual appearance inspection device of claim 1, further comprising a wiping mechanism disposed below the speed multiplication chain mechanism, a wiping rod of which is in contact with the roller surface.

8. The cylindrical workpiece visual appearance inspection device of claim 7, wherein the wiping rod is made of sponge and is fixedly sleeved on a rotating shaft in driving connection with a motor.

9. The apparatus for inspecting visual appearance of cylindrical workpiece according to claim 1, wherein the qualified product receiving mechanism comprises an inclined slide, a baffle is disposed on the side of the inclined slide close to the upper end and far away from the speed-doubling chain mechanism 1, and a turnover discharging plate is disposed on the lower end.

10. The visual appearance inspection device for cylindrical workpieces as set forth in claim 9, wherein said accepted product receiving mechanism further comprises a discharging device, said discharging device is installed in the middle of said inclined slide and comprises a mounting frame, a cylinder and an L-shaped stopper, said cylinder is fixedly installed on said mounting frame, the horizontal portion of said L-shaped stopper is fixedly connected to the piston rod of said cylinder, and the width of the vertical portion thereof is smaller than the width of said inclined slide.

Technical Field

The invention belongs to the technical field of automobile part detection, and particularly relates to a visual appearance detection device for a cylindrical workpiece.

Background

With the development of society, automobiles are more and more popular. Accordingly, the demand for automobiles is also increasing. Most of the existing automobile assembly operations are automated, but most of the accessories (particularly cylindrical workpieces) of the automobiles are detected in a manual operation mode, so that the problems of low working efficiency, high labor cost and the like exist.

Disclosure of Invention

The invention aims to provide a cylindrical workpiece visual appearance detection device to solve the problems. Therefore, the invention adopts the following specific technical scheme:

A visual appearance detection device for a cylindrical workpiece comprises a double-speed chain mechanism, a first end surface appearance detection mechanism, a second end surface appearance detection mechanism, an excircle appearance detection mechanism, a material pushing mechanism, a material detection photoelectric sensor, a synchronous photoelectric sensor and a control system electrically connected with the synchronous photoelectric sensor, wherein the double-speed chain mechanism comprises a roller for conveying the cylindrical workpiece, the roller is provided with an engraved groove, the engraved groove extends from one end of the roller to the other end in a spiral manner, cameras of the first end surface appearance detection mechanism and the second end surface appearance detection mechanism are respectively arranged on two sides of the double-speed chain mechanism and are used for shooting two end surface appearances of the cylindrical workpiece and conveying the two end surface appearances to the control system, the camera of the excircle appearance detection mechanism is arranged above the double-speed chain mechanism and is used for shooting the excircle appearance of the cylindrical workpiece and conveying the excircle appearance to the control system, the material pushing mechanism pushes qualified cylindrical workpieces to the qualified product receiving mechanism from the speed-multiplying chain mechanism according to the detection result of the control system, and the material detection photoelectric sensor is arranged at the feeding end of the speed-multiplying chain mechanism and is matched with the synchronous photoelectric sensor to determine the current position of the cylindrical workpieces.

further, the outer circle appearance detection mechanism is arranged between the first end face appearance detection mechanism and the second end face appearance detection mechanism.

Furthermore, the synchronous photoelectric sensor is a groove-shaped photoelectric sensor and is matched with a disc with a notch, which is arranged on a rotating shaft of the speed-multiplying chain mechanism.

Further, the outer appearance detection mechanism comprises a coaxial light source and a dome light source, and the coaxial light source is arranged between the camera of the outer appearance detection mechanism and the dome light source.

further, a corresponding light shielding plate is arranged on one side of the speed multiplying chain mechanism opposite to the cameras of the first end surface appearance detection mechanism and the second end surface appearance detection mechanism.

Furthermore, the installation positions of the cameras of the first end face appearance detection mechanism and the second end face appearance detection mechanism are adjustable.

Further, a wiping mechanism is further included, which is arranged below the speed multiplying chain mechanism, and a wiping rod of the wiping mechanism is in contact with the surface of the roller.

Furthermore, the wiping rod is made of sponge and fixedly sleeved on a rotating shaft in driving connection with the motor.

Furthermore, the qualified product receiving mechanism comprises an inclined slide way, one side of the inclined slide way, which is close to the upper end and is far away from the speed doubling chain mechanism, is provided with a baffle, and the lower end of the inclined slide way is provided with a turnover discharging plate.

Furthermore, certified products receiving agencies still includes the blowing device, the blowing device is installed the middle part of slope slide, including mounting bracket, cylinder and L shape dog, the cylinder fixed mounting be in on the mounting bracket, the horizontal part fixed connection of L shape dog in on the piston rod of cylinder to the width of its vertical part is less than slope slide width.

By adopting the technical scheme, the invention has the beneficial effects that: the cylindrical workpiece moves along with the movement of the speed-multiplying chain roller, and the cameras distributed around the speed-multiplying chain mechanism sequentially perform appearance detection on the two ends and the excircle of the cylindrical workpiece, so that the device has the advantages of high production efficiency, smooth operation and reliable detection.

Drawings

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

FIG. 1 is a perspective view of a cylindrical workpiece visual appearance inspection device according to an embodiment of the present invention;

FIG. 2 is a perspective view of a double speed chain mechanism of the apparatus for inspecting visual appearance of cylindrical workpieces shown in FIG. 1;

FIG. 3 is a perspective view of the rollers of the speed chain mechanism shown in FIG. 2;

FIG. 4 is a perspective view of a wiping mechanism of the cylindrical visual appearance inspection device of FIG. 1;

FIG. 5 is a perspective view of an end face appearance inspection mechanism of the cylindrical workpiece visual appearance inspection device shown in FIG. 1;

FIG. 6 is a perspective view of the outer circular appearance inspection mechanism of the cylindrical visual appearance inspection apparatus of FIG. 1;

FIG. 7 is a perspective view of the push-pull mechanism of the cylindrical visual appearance inspection device of FIG. 1 with the outer housing removed to show the internal structure;

Fig. 8 is a perspective view of a non-defective product receiving mechanism of the visual appearance inspection apparatus for cylindrical workpieces.

Detailed Description

the invention will now be further described with reference to the accompanying drawings and detailed description.

Fig. 1 shows a visual appearance detection device for a cylindrical workpiece according to an embodiment of the present invention, which may include a double-speed chain mechanism 1, a first end surface appearance detection mechanism 2, a second end surface appearance detection mechanism 3, an outer circle appearance detection mechanism 4, a material pushing mechanism 5, a material detection photoelectric sensor 6 (see fig. 2), a synchronous photoelectric sensor 7, and a control system (not shown) electrically connected thereto. The control system is based on a PLC and is used for controlling the operation of the corresponding mechanism according to a preset program so as to automatically complete the detection of the appearance size of the cylindrical workpiece and separate the cylindrical workpiece into a qualified container and an unqualified container. The specific configuration of the control system can be set according to actual requirements and is not described here. The specific structure of each mechanism will be described in detail below.

As shown in fig. 1 to 4, the double-speed chain mechanism 1 may include a motor 11, a driving gear 12, a driven gear 13, a chain 14, a roller 15, and the like. The motor 11 is in driving connection with the driving gear 12, specifically, the driving gear 12 is fixedly mounted on a rotating shaft, and the rotating shaft is connected with the motor 11 through a coupler. The chain 14 is wound around and engaged with the driving gear 12 and the driven gear 13, so that the motor 11 can move the chain 14. The roller 15 is rotatably mounted to the chain 14 such that the roller 15 can rotate during movement with the chain 14. Therefore, the cylindrical workpiece can be rolled while being moved forward by the rollers 15. The roller 15 has a groove 151 formed therein, and the groove 151 extends spirally from one end of the roller to the other end. Whether the roller 15 rotates or not can be judged through the grooving 151, so that whether the cylindrical workpiece rotates or not in the detection process is judged, and the accuracy of excircle appearance detection is ensured. In addition, the engraved grooves 151 also serve to increase the friction force with the cylindrical workpiece, thereby ensuring that the cylindrical workpiece can rotate as the rollers 15 rotate.

In order to keep the roller 15 clean, the cylindrical workpiece visual appearance inspection device may further include a wiping mechanism 8, and the wiping mechanism 8 is used for wiping the surface of the roller 15 to remove dirt on the surface of the roller 15. The wiping mechanism 8 may include a motor 81, a mounting bracket 82, a shaft 83, and a wiping bar 84. The motor 81 is in driving connection with the rotating shaft 83, the rotating shaft 83 is mounted on the mounting frame 82 through a corresponding bearing, and the wiping rod 84 is fixedly sleeved on the rotating shaft 83 and is in surface contact with the roller 15. The motor 81 drives the wiping rod 84 to rotate, so as to clean the surface of the roller 15. The wiping bar 84 may be made of sponge or fabric or the like.

as shown in fig. 1 and 5, a first end face appearance detection mechanism 2 and a second end face appearance detection mechanism 3 are respectively installed on both sides of the double-speed chain mechanism 1 for appearance detection of both end faces of the cylindrical workpiece. The first end surface appearance detecting means 2 and the second end surface appearance detecting means 3 have the same configuration, and the configuration thereof will be described below by taking the first end surface appearance detecting means 2 as an example. The end face appearance detection mechanism 2 may include a base 21, a vertical slider 22, a hand wheel 23, a lateral manual displacement platform 24, a camera 25, a light source 26, and the like. The vertical sliding block 22 is slidably mounted on the base 21, the hand wheel 23 is mounted on the base 21 through a screw rod, and the end of the screw rod is fixedly connected with the vertical sliding block 22 so as to drive the vertical sliding block 22 to ascend and descend. Horizontal manual displacement platform 24 fixed mounting is in perpendicular slider 22, and camera 25 and light source 26 are installed on horizontal manual displacement platform 24 for its position can be adjusted according to the size of waiting to detect cylindrical work piece, in order to ensure that camera 25 can clearly shoot cylindrical work piece's terminal surface picture, thereby guarantee the accuracy of testing result. The camera 25 is used for shooting the appearances of the two end faces of the cylindrical workpiece and transmitting the appearances to the control system, the control system processes the pictures shot by the camera 25 and compares the pictures with the standard, and the end faces are judged to be qualified if the pictures meet the standard. The camera 25 may be a CCD or CMOS camera. The light source 26 is used to ensure the brightness required for the shooting by the camera 25. The lateral manual displacement platform 24 is commercially available, such as the LWX40 series.

In the illustrated embodiment, the sides of the base 21 and the lateral manual displacement platform 24 are provided with corresponding scales 27 to facilitate fine adjustment of the position of the camera head 25 and the light source 26.

In order to ensure the imaging effect of the cameras of the first end face appearance detecting mechanism 2 and the second end face appearance detecting mechanism 3, a corresponding light shielding plate 10 is provided on the side of the double speed chain mechanism 1 opposite to the cameras.

As shown in fig. 1 and 6, an outer circumferential appearance detecting mechanism 4 is installed above the double-speed chain mechanism 1 for detecting the outer circumferential appearance of the cylindrical workpiece. In the present embodiment, the outer circumferential appearance detecting mechanism 4 is disposed between the first end face appearance detecting mechanism 2 and the second end face appearance detecting mechanism 3. It should be understood that the outer circular appearance detecting means 4 may be arranged before or after the first end face appearance detecting means 2 and the second end face appearance detecting means 3. The cylindrical appearance detecting mechanism 4 may include a base 41, a vertical manual displacement table 42, a camera 43, a coaxial light source 44, and a dome light source 45. Vertical manual displacement platform 42 is fixed mounting on base 41, and camera 43, coaxial light source 44 and dome light source 45 install on vertical manual displacement platform 42 for its vertical position is adjustable, in order to ensure that camera 43 can shoot the excircle outward appearance picture of clear cylindrical work piece, thereby guarantees the accuracy of testing result. The vertical manual displacement stage 42 is commercially available, such as the LWX40 series, and the like. The coaxial light source 44 is disposed between the camera 43 and the dome light source 45 for ensuring brightness required for photographing by the camera 43. The camera 43 is used for shooting the outer circle appearance of the cylindrical workpiece and transmitting the outer circle appearance to the control system, the control system processes the picture shot by the camera 43 and compares the picture with the standard, and the outer circle appearance is judged to be qualified if the picture meets the standard. The camera 43 may be a CCD or CMOS camera. Within the field of view of the camera 43, the workpiece can rotate more than 1.5 turns, ensuring that the appearance of the outer circle does not miss inspection.

As shown in fig. 1 and 7, the pushing mechanism 5 is installed at one side of the double-speed chain mechanism 1, and is used for pushing the cylindrical workpiece which is qualified in detection (both end surface and excircle appearance are qualified) from the double-speed chain mechanism 1 to the qualified product receiving mechanism 9 according to the detection result of the control system. Specifically, the pushing mechanism 5 may include a base 51, a slider 52, a hand wheel 53, a linear cylinder 54, and a push rod 55. The sliding block 52 is slidably arranged on the base 51, the hand wheel 53 is arranged on the base 51 through a screw rod, the tail end of the screw rod is fixedly connected to the sliding block 52, and the sliding block 52 is driven to move up and down by rotating the hand wheel 53. A linear cylinder 54 is mounted on the slide 52, the piston rod of which is fixedly connected to a push rod 55. The base 51 is provided with a scale 511 on the side surface thereof, and the slider 52 is provided with a pointer 521 for precisely adjusting the height position of the push rod 55 to be aligned with the end surface of the cylindrical workpiece.

in this embodiment, the pushing mechanism 5 is further provided with a proximity switch 56, and the proximity switch 56 is mounted on the sliding block 52 and used for detecting whether the pushing rod 56 is pushed in place or not, so as to avoid pushing the cylindrical workpiece out of the qualified product receiving mechanism 9.

The material pushing mechanism 5 adopts the principle of zero misjudgment of qualified workpieces, and the linear air cylinder 54 only acts when the qualified workpieces are detected, so that the unqualified workpieces cannot be mixed into the qualified workpieces due to the false operation of the linear air cylinder 54.

As shown in fig. 1 and 8, the qualified product receiving mechanism 9 is disposed on one side of the speed-multiplying chain mechanism 1 opposite to the pushing mechanism 5, and may include an inclined chute 91 and a material placing device 92, wherein a baffle 93 is disposed on one side of the inclined chute 91 close to the upper end and far away from the speed-multiplying chain mechanism 1, and the baffle 93 is recessed to prevent the cylindrical workpiece from falling out of the chute 91. The lower end of the inclined slideway 91 is provided with a turnover discharging plate 94, and a rotating shaft of the discharging plate 94 is in driving connection with an air cylinder 95. The air cylinder 95 drives the discharge plate 94 to turn upward to allow the cylindrical workpiece on the inclined chute 91 to fall into a good container (not shown), whereas the cylindrical workpiece remains on the inclined chute 91. By arranging the material placing plate 94, the damage caused by too fast falling speed of the cylindrical workpiece can be avoided. The baffle 93 and the discharge plate 94 may be made of non-metallic elastic material such as rubber. Blowing device 92 is installed at the middle part of oblique slide 91, including mounting bracket 921, cylinder 922 and L shape dog 923, cylinder 922 fixed mounting is on mounting bracket 921, and the horizontal part fixed connection of L shape dog 923 is on the piston rod of cylinder 922, and the width of vertical part is less than oblique slide 91 width for block the work piece. Specifically, the width of the vertical portion is slightly smaller than the width of the inclined ramp 91. The cylinder 922 drives the L-shaped stop 923 up to allow the cylindrical workpiece on the inclined ramp 91 to continue to slide down, whereas the cylindrical workpiece remains on the inclined ramp 91. Through setting up blowing device 92, can realize the buffering to avoid cylindrical work piece gliding speed too fast, cause the damage to slide 91. The L-shaped stopper 923 may be made of a non-metallic elastic material such as rubber. It should be understood that in some embodiments, the emptying device 92 may also be omitted.

returning to fig. 1 and 2, a material detection photoelectric sensor 6 is installed at the feed end of the double speed chain mechanism 1, and a synchronous photoelectric sensor 7 is installed at the drive end of the double speed chain mechanism 1. Specifically, the synchronous photoelectric sensor 7 is a groove-type photoelectric sensor, and is fitted with a disc 71 having a notch, which is fixedly mounted on the rotating shaft of the double speed chain mechanism 1. When the material detecting photoelectric sensor 6 detects that a cylindrical workpiece is arranged on the speed doubling chain mechanism 1, the synchronous photoelectric sensor 7 is matched to control the cameras of the first end surface appearance detecting mechanism 2, the second end surface appearance detecting mechanism 3 and the excircle appearance detecting mechanism 4 and the linear air cylinder 54 of the material pushing mechanism 5 to act. Specifically, when the cylindrical workpiece just passes through the camera, the camera is started to perform shooting detection operation, and when the cylindrical workpiece qualified through the material pushing position is detected, the linear air cylinder 54 acts to push the cylindrical workpiece to the qualified product receiving mechanism 9.

The working principle of the invention is briefly explained as follows: cylindrical workpieces to be detected enter the feeding end of the speed-multiplying chain mechanism 1 one by one, and along with the operation of the speed-multiplying chain mechanism 1, the cylindrical workpieces move forwards and rotate between the rollers 15, and are subjected to corresponding appearance detection through the first end face appearance detection mechanism 2, the excircle appearance detection mechanism 4 and the second end face appearance detection mechanism 3; according to the detection result, the qualified cylindrical workpieces are sent into the slideway 91 of the qualified product receiving mechanism 9 by the material pushing mechanism 5 and finally collected into a qualified product container, and the unqualified cylindrical workpieces continue to move along with the roller 15 and are finally collected into an unqualified product container below the speed doubling chain mechanism 1. The invention initiatively adopts a mode that the appearance of the cylindrical workpiece is detected on the speed multiplying chain, in particular to a mode that the cylindrical workpiece and the speed multiplying chain are continuously operated, and a vision system selects a machine to dynamically grab a picture, analyze and detect the appearance of the cylindrical workpiece in the moving process of the cylindrical workpiece, the whole detection process is automatically carried out without manual intervention, and the invention has the advantages of high production efficiency, smooth operation and reliable detection.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.