CN112683342A

CN112683342A - Workpiece detection equipment

Info

Publication number: CN112683342A
Application number: CN202110102093.9A
Authority: CN
Inventors: 张海宁; 沈丹军; 胡志文; 韦宁; 卫伟
Original assignee: Mitsubishi Electric Guangzhou Compressor Co Ltd
Current assignee: Mitsubishi Electric Guangzhou Compressor Co Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-04-20

Abstract

The invention relates to the technical field of workpiece detection, in particular to workpiece detection equipment which comprises a positioning tool, a workpiece end face detection device and a screw assembly detection device. On one hand, the invention can be used for jointing the end surface to be detected of the workpiece and blowing air through the air blowing pipe, measuring the air pressure in the air blowing pipe through the air pressure detection unit, comparing the air pressure value obtained by detection with the qualified air pressure range, judging the jointing degree of the end surface to be detected and the air outlet end surface of the air blowing pipe, and accordingly, quickly judging whether the assembly of the workpiece is correct or not, and improving the efficiency of qualified detection of the assembly of the workpiece; on the other hand, the screw assembly detection device is arranged, the screw abutting part is driven to abut against one axial end of a screw assembled on the workpiece through the driving mechanism, and at the moment, the position of the screw abutting part is detected through the screw detection unit, so that whether the screw is assembled in place or not is judged, and the reliability of workpiece assembly and the efficiency of qualified product quality detection are improved.

Description

Workpiece detection equipment

Technical Field

The invention relates to the technical field of workpiece detection, in particular to workpiece detection equipment.

Background

Equipment comprises a plurality of spare parts, and in process of production, needs a plurality of spare parts to assemble according to fixed cooperation, and because the requirement of spare part quantity is more and assembly precision improves gradually, and the difference that some spare parts are structural does not pass through careful observation and is difficult to discover, and this just leads to easily appearing the mistake in assembly process, for example:

1) the front surface and the back surface of the part are different in structure, the front surface is a plane, the back surface is an arc surface, the front surface and the back surface are different in structure, the structure is difficult to find through manual observation, and the front surface and the back surface are easy to install reversely when being installed, so that the product cannot be used after being assembled, and the product is assembled again after being disassembled, so that manpower and material resources are wasted;

2) the workpiece has requirements on the structure of a machined surface of the surface, and needs to be an arc surface or a plane, and when the radian of the arc surface is small, the arc surface is difficult to judge manually.

In addition, most of workpiece assembly needs to use screws for connection, and in products with high precision requirements, the height of the screws screwed into the workpieces has high requirements, the prior art generally controls the screwing torque through an automatic screwing device, but due to the fact that machining precision of screw holes and screw threads has deviation, the torque detected by the automatic screwing device is the same, and the screwing height difference of the screws is large.

Disclosure of Invention

The invention aims to provide workpiece detection equipment which is beneficial to realizing the detection of the corresponding end surface of a part when a workpiece is correctly assembled and the detection of whether an assembly screw is screwed in to reach a qualified height, thereby ensuring the quality of product assembly and improving the production efficiency.

In order to achieve the above object, the present invention provides a workpiece detecting apparatus comprising:

the positioning tool is used for positioning and placing the workpiece;

the workpiece end face detection device comprises a blowing mechanism, an air pressure detection unit and a moving mechanism, wherein the blowing mechanism comprises an air blowing pipe, an air outlet end face used for being attached to the qualified end face of a workpiece is arranged at the air outlet end of the air blowing pipe, the air pressure detection unit is connected with the air blowing pipe and used for detecting the air pressure in the air blowing pipe, and the blowing mechanism is arranged on the moving mechanism; and

screw assembly detection device, it includes high detection mechanism and actuating mechanism, high detection mechanism including be used for with the screw butt piece of the screw butt that awaits measuring of work piece and be used for detecting screw butt piece and the screw detecting element of screw butt position when awaiting measuring the screw butt, high detection mechanism connect in actuating mechanism's output is in order to be used for driving high detection mechanism and to remove along the axial direction of the screw that awaits measuring.

Optionally, the positioning tool includes at least two positioning pins for being inserted into the positioning holes of the workpiece.

Optionally, the blowing mechanism further comprises a detection mounting platform and an elastic assembly, and the blowing pipe is movably mounted on the detection mounting platform through the elastic assembly.

Optionally, the resilient mounting assembly comprises:

the movable mounting plate is provided with an accommodating channel, the accommodating channel is internally sleeved with the air blowing pipe, and the rear end of the air blowing pipe is provided with a third spring which is connected with the detection mounting platform;

one end of the guide rod is fixedly connected with the movable mounting plate, and the other end of the guide rod penetrates through the detection mounting platform and is in sliding connection with the detection mounting platform; and

the first spring is sleeved outside the guide rod, one end of the first spring is abutted against the movable mounting plate, and the other end of the first spring is abutted against the detection mounting platform.

Optionally, the detection mounting platform includes:

the connecting block is provided with an accommodating cavity, the upper end face of the connecting block is provided with a guide groove communicated with the accommodating cavity, and the front end face of the connecting block is provided with a blowing pipe sleeve communicated with the accommodating cavity;

the guide pipe penetrates through the guide groove and can slide along the extension direction of the guide groove, one end of the guide pipe is communicated with the air pressure detection unit, and the other end of the guide pipe is communicated with the air blowing pipe;

the air blowing pipe penetrates through the air blowing pipe sleeve, one end of the third spring is abutted to the air blowing pipe, and the other end of the third spring is abutted to the inner side wall of the accommodating cavity.

Optionally, the rear end of the blowing pipe is provided with a limiting block, the limiting block is provided with an air vent, one end of the air vent is communicated with the blowing pipe, the other end of the air vent is communicated with the guide pipe, the projection area of the axial direction of the limiting block is larger than that of the trepanning axial direction of the blowing pipe sleeve, and one end of the third spring is abutted against the limiting block, and the other end of the third spring is abutted against the inner side wall of the accommodating cavity.

Optionally, the air outlet end face is an air outlet plane used for being attached to the qualified end face of the workpiece.

Optionally, the moving mechanism includes a horizontal moving assembly and a moving installation platform, the horizontal moving assembly is installed on the moving installation platform, and the blowing mechanism is installed on the horizontal moving assembly to move in the horizontal direction.

Optionally, the horizontal moving assembly comprises a horizontal driving cylinder, the horizontal driving cylinder is fixedly mounted on the movable mounting platform, and the detection mounting platform is connected with the output end of the horizontal driving cylinder.

Optionally, the height detection mechanism includes a height detection platform, the output end of the driving mechanism is fixedly connected with the height detection platform, the screw abutting piece is movably mounted on the height detection platform, and the screw detection unit is arranged on the height detection platform and used for detecting the position of the screw abutting piece relative to the height detection platform.

Optionally, the screw abutting piece is a screw abutting column, the height detection platform is provided with at least one guide hole, the screw abutting column is slidably arranged in the guide hole in a penetrating manner, and the screw detection unit is arranged at one end of the guide hole.

Optionally, the screw abutting column is sleeved with a second spring, and one end of the second spring is fixedly connected with the screw abutting column or the height detection platform.

Optionally, the peripheral wall of the screw abutting column is provided with an annular protrusion for detecting by the screw detecting unit.

Optionally, the automatic feeding mechanism is used for continuously conveying the positioning tool, and the positioning tool is placed on the automatic feeding mechanism to move.

Optionally, the system further comprises a workpiece detection system, which includes:

the feeding detection unit is used for detecting whether the workpiece reaches a detection position;

the material blocking mechanism is arranged at the discharge end of the automatic feeding mechanism and comprises a material blocking switch;

a storage detection unit for detecting whether the abnormal workpiece is placed in a preset placement position; and

a control unit;

the air pressure detection unit, the screw detection unit, the feeding detection unit, the material stop switch and the storage detection unit are all electrically connected with the control unit.

Optionally, the storage device further comprises an abnormal workpiece storage platform, and the abnormal workpiece storage platform is provided with the storage detection unit.

The embodiment of the invention has the following technical effects:

on one hand, the invention can be used for jointing the end face to be tested of the workpiece through the air blowing pipe and blowing air, and the joint degree of the qualified end face and the unqualified end face of the end face to be tested of the workpiece and the air blowing pipe is different, so that the air pressure in the air blowing pipe is measured through the air pressure detection unit, the joint degree of the end face to be tested and the air outlet end face of the air blowing pipe is judged according to the comparison between the air pressure value obtained by detection and the qualified air pressure range, and the joint degree of the end face to be tested and the air outlet end face of the air blowing pipe is judged, so that whether;

on the other hand, a screw assembly detection device is arranged, the screw abutting part is driven to abut against one axial end of a screw assembled on the workpiece through the driving mechanism, and at the moment, the position of the screw abutting part is detected through the screw detection unit, so that whether the screw is assembled in place or not is judged, and the reliability of workpiece assembly and the efficiency of qualified product quality detection are improved;

finally, the air blowing mechanism and the height detection mechanism are respectively driven by the moving mechanism and the driving mechanism, so that the end face of the workpiece and the screw assembling height can be simultaneously detected, and the detection efficiency is further improved.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a positioning tool in the embodiment shown in FIG. 1;

FIG. 3 is a schematic structural view of the workpiece end face inspection apparatus in the embodiment shown in FIG. 1;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

FIG. 5 is a schematic diagram of the detection of the end surface to be detected in cooperation with the workpiece in the embodiment shown in FIG. 1;

FIG. 6 is an enlarged schematic view at B in FIG. 5;

FIG. 7 is a partial cross-sectional view of the embodiment of FIG. 3;

FIG. 8 is a schematic structural view of a screw-fit detecting device in the embodiment shown in FIG. 1;

FIG. 9 is a schematic structural view of the screw abutment in the embodiment shown in FIG. 8;

FIG. 10 is a schematic view of the embodiment of FIG. 1 illustrating the detection of screw height in conjunction with a workpiece;

FIG. 11 is a control schematic block diagram of the workpiece sensing apparatus in the embodiment shown in FIG. 1;

FIG. 12 is a front view of a workpiece inspected by the embodiment of FIG. 1;

FIG. 13 is a partial cross-sectional view of the workpiece shown in FIG. 12.

Description of reference numerals:

100. a positioning tool 110 and a positioning pin;

200. the device comprises a workpiece end face detection device, 210, an air blowing mechanism, 211, an air blowing pipe, 211a, an air outlet end face, 212, a detection installation platform, 212a, a connecting block, 212b, a guide groove, 212c, an air blowing pipe sleeve, 212d, a guide pipe, 212e, a limiting block, 213, an elastic assembly component, 213a, a movable installation plate, 213b, a guide rod, 213c, a first spring, 213d, an arc-shaped end face, 213e, an annular convex nozzle, 213f, a third spring, 220, an air pressure detection unit, 230, a moving mechanism, 231, a horizontal driving cylinder, 232 and a moving installation platform;

300. the device comprises a screw assembly detection device, 310, a height detection mechanism, 311, a screw abutting piece, 311a, an annular bulge, 312, a screw detection unit, 313, a height detection platform, 314, a second spring, 320 and a driving mechanism;

400. an automatic feed mechanism, 410, transport rollers;

500. the device comprises a workpiece detection system, 510, a feeding detection unit, 520, a material stop mechanism, 521, a material stop switch, 530, a storage detection unit, 540, a control unit, 550, a screw height abnormity count display, 560, an end surface abnormity count display to be detected, 570, a screw height abnormity alarm indicator lamp, 580 and an end surface abnormity alarm indicator lamp to be detected;

600. an abnormal workpiece storage platform;

700. 710 parts of a workpiece, a sliding sheet, 711 parts of an end face to be measured, 720 parts of a screw.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In addition, the terms "first", "second", and the like are employed in the present invention to describe various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

Referring to fig. 1 to 13, an embodiment of the present invention provides a workpiece detection apparatus, including a positioning tool 100, a workpiece end surface detection device 200, and a screw assembly detection device 300.

Referring to fig. 2, the positioning tool 100 is used for positioning and placing a workpiece;

referring to fig. 3-7, the workpiece end face detection apparatus 200 includes a blowing mechanism 210, an air pressure detection unit 220 and a moving mechanism 230, the blowing mechanism 210 includes a blowing pipe 211, an air outlet end of the blowing pipe 211 is provided with an air outlet end face 211a for fitting to a qualified end face of a workpiece, the air pressure detection unit 220 is connected to the blowing pipe 211 for detecting air pressure inside the blowing pipe 211, and the blowing mechanism 210 is mounted on the moving mechanism 230; and

referring to fig. 8 to 10, the screw assembling detection apparatus 300 includes a height detection mechanism 310 and a driving mechanism 320, the height detection mechanism 310 includes a screw abutting part 311 for abutting against a screw to be detected of a workpiece and a screw detection unit 312 for detecting a position of the screw abutting part 311 when abutting against the screw to be detected, and the height detection mechanism 310 is connected to an output end of the driving mechanism 320 for driving the height detection mechanism 310 to move along an axial direction of the screw to be detected.

Therefore, on one hand, the invention can attach the end face to be tested of the workpiece through the air blowing pipe 211 and blow air, and because the attaching degrees of the qualified end face and the unqualified end face of the end face to be tested of the workpiece and the air blowing pipe 211 are different, the air pressure in the air blowing pipe 211 is measured through the air pressure detection unit 220, and the attaching degree of the end face to be tested and the air outlet end face 211a of the air blowing pipe 211 is judged according to the comparison between the air pressure value obtained by detection and the qualified air pressure range, so that whether the end face to be tested of the workpiece is the qualified end face is judged, whether the assembly of the workpiece is correct is judged rapidly according;

on the other hand, the screw assembly detection device 300 is provided, the driving mechanism 320 drives the screw abutting piece 311 to abut against one end of the axial direction of the screw assembled on the workpiece, and at the moment, the position of the screw abutting piece 311 is detected through the screw detection unit 312, so that whether the screw is assembled in place or not is judged, and the reliability of workpiece assembly and the efficiency of qualified product quality detection are improved.

It should be noted that the screw attachment detection device 300 of the present invention can be used not only for detecting the height of a screw, but also for detecting the height of other attachment components when they are attached to an attachment body.

Further, referring to fig. 2, the positioning tool 100 in an embodiment of the present invention includes at least two positioning pins 110 for being inserted into the positioning holes of the workpiece, and the workpiece is positioned by the two positioning pins 110 and limited, so as to prevent the workpiece from rotating around the axial direction of the positioning pins 110.

Specifically, referring to fig. 3, in order to avoid rigid collision between the blowing pipe 211 and the end surface to be tested, and according to different distances between the end surfaces to be tested, the air outlet end surface 211a of the blowing pipe 211 is abutted to the end surface to be tested, the air blowing mechanism 210 in this embodiment further includes a detection mounting platform 212 and an elastic assembly component 213, the blowing pipe 211 is movably mounted on the detection mounting platform 212 through the elastic assembly component 213, so that the position of the blowing pipe 211 when being abutted to the end surface to be tested is adjusted through the elastic assembly component 213, and the stability and reliability of the use of the blowing pipe 211 are improved.

Referring to fig. 3 to 7, the elastic fitting assembly 213 in the present embodiment includes:

the movable mounting plate 213a is provided with an accommodating channel, the accommodating channel is internally sleeved with the air blowing pipe 211, the rear end of the air blowing pipe 211 is provided with a third spring 213f which is connected with the detection mounting platform 212, and the pipe orifice of the accommodating channel is provided with an annular convex nozzle 213e which is integrally formed with the movable mounting plate;

one end of the guide rod 213b is fixedly connected with the movable mounting plate 213a, and the other end of the guide rod passes through the detection mounting platform 212 and is in sliding connection with the detection mounting platform 212, so that when the detection mounting platform 212 and the movable mounting plate 213a move relative to a workpiece, the guide rod 213b moves along the axial direction of the guide rod 213b, and the moving stability of the gas blow pipe 211 is improved; and

the first spring 213c is sleeved outside the guide rod 213b, one end of the first spring 213c abuts against the movable mounting plate 213a, and the other end abuts against the detection mounting platform 212, so that the movable mounting plate 213a always keeps abutting against the end surface to be detected through the deformation of the spring and the elastic potential energy generated by the deformation, and rigid collision between the movable mounting plate 213a and the workpiece is avoided.

Specifically, referring to fig. 7, the inspection mounting platform 212 includes:

the connecting block 212a is provided with an accommodating cavity, the upper end face of the connecting block 212a is provided with a guide groove 212b communicated with the accommodating cavity, and the front end face of the connecting block 212a is provided with a blowing pipe sleeve 212c communicated with the accommodating cavity;

a guide tube 212d inserted through the guide groove 212b and slidable in the extending direction of the guide groove 212b, one end of which is communicated with the air pressure detecting unit 220 and the other end of which is communicated with the blowing tube 211;

wherein, the gas blowing pipe 211 is arranged in the gas blowing pipe sleeve 212c in a penetrating way, one end of the third spring 213f is abutted with the gas blowing pipe 211, and the other end is abutted with the inner side wall of the accommodating cavity.

Thus, the blowing pipe 211 is protected by the blowing pipe sleeve 212c, the blowing pipe 211 is prevented from being collided by foreign objects, the guide pipe 212d is limited to slide along the extending direction of the guide groove, the moving direction of the blowing pipe 211 is further limited, and the moving stability of the blowing pipe 211 is improved.

Furthermore, a limiting block 212e is arranged at the rear end of the blowing pipe 211, a vent hole is formed in the limiting block 212e, one end of the vent hole is communicated with the blowing pipe 211, the other end of the vent hole is communicated with the guide pipe 212d, the projection area of the limiting block 212e in the axial direction is larger than that of a sleeve hole of the blowing pipe sleeve 212c in the axial direction, one end of a third spring 213f is abutted against the limiting block 212e, and the other end of the third spring is abutted against the inner side wall of the accommodating cavity; on one hand, the air blowing pipe 211 and the guide pipe 212d are connected through the limiting block 212e, so that the limiting block 212e, the air blowing pipe 211 and the guide pipe 212d can be assembled and disassembled conveniently, and therefore, the parts can be replaced independently after being damaged, replacement cost is reduced, and particularly, the air blowing pipe 211 and the guide pipe 212d are connected with the limiting block 212e in a threaded connection mode to achieve detachable replacement; on the other hand, by arranging the limit block 212e, the projection area of the axial direction of the limit block 212e is larger than the projection area of the axial direction of the sleeve hole of the blowing sleeve 212c, the moving range of the limit block 212e is limited in the accommodating cavity, so that the blowing pipe connected with the limit block 212e is prevented from being separated from the accommodating cavity, and the use is safer and more reliable.

The movable mounting plate 213a in this embodiment has an arc-shaped end surface 213d that is attached to the workpiece 700.

Thus, when the gas blow pipe 211 contacts with the end surface to be measured, firstly, the moving mechanism 230 drives the detection mounting platform 212 and the movable mounting plate 213a to move towards the workpiece direction, when the arc-shaped end surface 213d of the movable mounting plate 213a is attached to the outer peripheral wall of the workpiece, the moving mechanism 230 drives the detection mounting platform 212 to move continuously, the gas blow pipe 211 is ejected from the accommodating channel and is abutted to the end surface to be measured, meanwhile, the gas blow pipe 211 is buffered and stably abutted to the end surface to be measured through the third spring 213f when being abutted to the end surface to be measured, when the third spring 213f deforms and buffers, the guide pipe 212d and the gas blow pipe 211 synchronously slide along the extending direction of the guide groove 212b, in addition, the arc-shaped end surface 213d is attached to the outer peripheral wall of the workpiece 700 to determine the relative position of the gas blow pipe 211 when the gas blow pipe 211 approaches the workpiece 700, and improve the reliability of the relative position of, thereby ensuring the stability of the blowing pipe 211 during the blowing process, and the blowing pipe 211 is accommodated in the accommodating channel and the blowing pipe sleeve 212c when not in operation, protecting the blowing pipe 211.

Furthermore, be equipped with the perforation on the lateral wall of the work piece in this embodiment, before gas blow pipe 211 got into the perforation, counterpoint earlier through annular convex mouth 213e and perforation, gas blow pipe 211 rethread perforation and the end face contact that awaits measuring to improve the position accuracy that gas blow pipe 211 got into.

Specifically, referring to fig. 4, the air outlet end surface 211a in this embodiment is an air outlet plane for being attached to a qualified end surface of a workpiece, the qualified end surface of the end surface to be detected in this embodiment is a plane, and the unqualified end surface is an arc surface, therefore, when the air outlet end surface 211a of the air blowing pipe 211 abuts against the end surface to be detected, if the air pressure value detected and obtained by the air pressure detecting unit 220 is smaller than the qualified air pressure range, the end surface to be detected is considered to be an unqualified end surface, the component is assembled incorrectly, the air outlet plane at this time abuts against the arc surface, and a gap is formed; if the air pressure value detected and obtained by the air pressure detection unit 220 is within the qualified air pressure range, the end face to be detected is considered to be a qualified end face, the assembly of the part is correct, and the air outlet plane is attached to the plane.

Further, referring to fig. 3, in order to horizontally move the blowing pipe 211 to abut against the end surface to be measured in the present embodiment, the moving mechanism 230 of the present embodiment includes a horizontal moving component and a moving installation platform 232, the horizontal moving component is installed on the moving installation platform 232, and the blowing mechanism 210 is installed on the horizontal moving component to move in the horizontal direction.

Specifically, the horizontal moving assembly in this embodiment includes a horizontal driving cylinder 231, the horizontal driving cylinder 231 is fixedly mounted on the movable mounting platform 232, and the detection mounting platform 212 is connected to an output end of the horizontal driving cylinder 231.

Further, referring to fig. 8, the height detection mechanism 310 in an embodiment of the present invention includes a height detection platform 313 to improve the stability of the arrangement of the screw detection unit 312 and the screw abutting member 311, wherein the output end of the driving mechanism 320 is fixedly connected to the height detection platform 313, the screw abutting member 311 is movably mounted on the height detection platform 313, and the screw detection unit 312 is disposed on the height detection platform 313 and is used for detecting the position of the screw abutting member 311 relative to the height detection platform 313.

The screw abutting part 311 in this embodiment is a screw abutting column, the height detection platform 313 is provided with at least one guide hole, the screw abutting column is slidably arranged in the guide hole, so that the stability of the screw abutting part 311 in sliding along the axial direction of the guide hole is better, and the screw detection unit 312 is arranged at one end of the guide hole, so as to facilitate the detection of the position of the screw abutting part 311 relative to the height detection platform 313.

Further, referring to fig. 9, the screw abutting column is sleeved with a second spring 314, and one end of the second spring 314 is fixedly connected to the screw abutting column or the height detecting platform 313, so that the screw abutting column can abut against the screw to be detected under the driving of the driving mechanism 320, and the rigid collision with the screw to be detected is avoided.

In order that the screw detection unit 312 can detect the relative position between the screw abutting column and the height detection platform 313 within a certain range, the peripheral wall of the screw abutting column in this embodiment is provided with an annular protrusion 311a for detecting the screw detection unit 312, and the screw detection unit 312 detects whether the annular protrusion 311a moves into the detection range to determine the position of the screw abutting column, specifically, the axial thickness of the annular protrusion 311a is set, so as to preset the detection range value of the screw detection unit 312, and allow the installation error of the screw to be detected to be within the axial thickness range of the annular protrusion 311a, where the axial thickness of the annular protrusion 311a in this embodiment is 0.2mm to 0.5 mm.

Referring to fig. 1, an embodiment of the present invention further includes an automatic feeding mechanism 400 for continuously conveying the positioning tool 100, where the positioning tool 100 is placed on the automatic feeding mechanism 400 to move, specifically, the automatic feeding mechanism 400 in this embodiment includes a plurality of conveying rollers 410 arranged in parallel, and the positioning tool 100 is disposed on the conveying rollers 410 and drives the positioning tool 100 to move by the rotation of the conveying rollers 410.

Further, referring to fig. 11, the workpiece inspection apparatus in the present embodiment further includes a workpiece inspection system 500, which includes:

a feeding detection unit 510 for detecting whether the workpiece reaches a detection position;

the material blocking mechanism 520 is arranged at the discharge end of the automatic feeding mechanism 400, and the material blocking mechanism 520 comprises a material blocking switch 521;

a storage detecting unit 530 for detecting whether the abnormal workpiece is placed in a preset placing position; and

a control unit 540;

the air pressure detecting unit 220, the screw detecting unit 312, the feeding detecting unit 510, the material stop switch 521 and the storage detecting unit 530 are electrically connected to the control unit 540.

Further, the control unit 540 is connected with and controls the air blowing mechanism 210, the moving mechanism 230, the driving mechanism 320 and the automatic feeding mechanism 400, so as to realize the automatic operation of the workpiece detection equipment.

Referring to fig. 1, the workpiece inspecting apparatus further includes an abnormal workpiece storage platform 600, and the abnormal workpiece storage platform 600 is provided with a storage inspecting unit 530.

Further, referring to fig. 1 and fig. 11, in order to facilitate respectively counting the number of the workpieces with abnormal screw height and abnormal end surface to be measured, the present embodiment further includes a screw height abnormal count display 550 and an abnormal end surface to be measured count display 560, and meanwhile, in order to facilitate monitoring whether an abnormality occurs by an operator, a screw height abnormal alarm indicator 570 and an abnormal end surface to be measured alarm indicator 580 are provided.

Therefore, based on the workpiece detection apparatus provided in the above embodiment, the workpiece end face detection device 200 is configured to detect whether the sliding piece 710 of the workpiece 700 in this embodiment is correctly installed, where the end face 711 to be detected of the sliding piece 710 may be a front face or a back face, the front face is a plane, and the back face is an arc face, when correctly installed, the front face of the sliding piece 710 should abut against and be attached to the air outlet end face 211a of the air blowing pipe 211, the screw assembly detection device 300 is configured to detect the screw 720 installed on the workpiece 700, and its working process is as follows:

1. placing a workpiece on the positioning tool 100 for positioning and limiting the position, and moving the positioning tool 100 to the detection position on the automatic feeding mechanism 400;

2. the feeding detection unit 510 detects whether the workpiece reaches a detection position;

3. when the workpiece reaches the detection position, the feeding detection unit 510 feeds back first detection information to the control unit 540, the horizontal driving cylinder 231 drives the air blowing pipe 211 to move towards the end surface to be detected and abut against the end surface to be detected, the air supply device supplies air into the air blowing pipe 211, meanwhile, the driving mechanism 320 drives the height detection platform 313 to descend, and the screw abutting column moves along the axial direction of the screw to be detected and abuts against the upper end of the screw to be detected;

4. the air pressure detecting unit 220 obtains the air pressure value in the blowing pipe 211, and the screw detecting unit 312 detects whether the annular protrusion 311a falls within the detection range;

when the workpiece is detected to be qualified:

when the air pressure value obtained by the air pressure detection unit 220 is detected to be within the qualified air pressure range, the air pressure detection unit 220 sends second detection information qualified for detection to the control unit 540, and when the screw detection unit 312 detects that the annular protrusion 311a falls into the detection range, the screw detection unit 312 sends third detection information qualified for detection to the control unit 540, at this time, the control unit 540 controls the automatic feeding mechanism 400 to drive the positioning tool 100 to move, controls the material blocking mechanism 520 to be in the release position, and enables the workpiece to move to the next machining process;

when the workpiece is detected to be unqualified:

1) the air pressure detection unit 220 detects that the acquired air pressure value is not in the qualified air pressure range, the air pressure detection unit 220 sends second detection information which is unqualified in detection to the control unit 540, the control unit 540 controls the abnormal counting display 560 of the end face to be detected to display the unqualified ranking value of the current unqualified workpiece, and meanwhile, the abnormal alarm indicator 580 of the end face to be detected is turned on;

when the screw detection unit 312 detects that the annular protrusion 311a does not fall into the detection range, the screw detection unit 312 sends third detection information which is unqualified in detection to the control unit 540, the control unit 540 controls the screw height abnormity count display 550 to record an unqualified ranking value of the current unqualified workpiece, and meanwhile, the screw height abnormity alarm indicator lamp 570 is turned on;

when the air pressure detecting unit 220 or the screw detecting unit 312 feeds back second detection information or third detection information which is unqualified in detection to the control unit 540, the material stopping mechanism 520 is controlled to be in a material stopping position, and a currently detected workpiece is prevented from flowing into the next machining process;

2) the control unit 540 sends the storage information to the storage detection unit 530;

3) when the alarm indicator lamp 580 for abnormal end surface to be detected and/or the alarm indicator lamp 570 for abnormal screw height are turned on, an operator takes out a workpiece on the positioning tool 100 blocked by the material blocking mechanism 520 and places the workpiece on the abnormal workpiece storage platform 600, when the storage detection unit 530 detects that the workpiece is placed on the abnormal workpiece storage platform 600 and feeds the workpiece back to the control unit 540, the control unit 540 controls the alarm indicator lamp 570 for abnormal screw height and/or the alarm indicator lamp 580 for abnormal end surface to be detected to be turned off, and controls the material blocking mechanism 520 to be in a release state.

Further, the number of the screw abutment members 311 and the screw detecting unit 312 in the present embodiment may be plural for detecting plural screws fitted on the workpiece at the same time, improving the detection efficiency.

In summary, in the invention, the blowing pipe 211 can be used for attaching the end face to be tested of the workpiece and blowing air, and since the fitting degrees of the qualified end face and the unqualified end face of the end face to be tested of the workpiece and the blowing pipe 211 are different, the air pressure in the blowing pipe 211 is measured by the air pressure detection unit 220, and the attachment degree of the end face to be tested and the air outlet end face 211a of the blowing pipe 211 is judged by comparing the air pressure value obtained by detection with the qualified air pressure range, so as to judge whether the end face to be tested of the workpiece is the qualified end face, and accordingly, whether the assembly of the workpiece is correct is quickly judged, and the efficiency;

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A workpiece inspection apparatus, comprising:

the positioning tool is used for positioning and placing the workpiece;

2. The workpiece detection device according to claim 1, wherein the positioning tool comprises at least two positioning pins for being inserted into the positioning holes of the workpiece.

3. The workpiece detection device according to claim 1, wherein the blowing mechanism further comprises a detection mounting platform and an elastic assembly component, and the blowing pipe is movably mounted on the detection mounting platform through the elastic assembly component.

4. The workpiece inspection apparatus of claim 3, wherein the resilient mount assembly comprises:

5. The workpiece inspection apparatus of claim 4, wherein the inspection mounting platform comprises:

6. The workpiece detection equipment as recited in claim 5, wherein a limiting block is arranged at the rear end of the blowing pipe, an air vent is formed in the limiting block, one end of the air vent is communicated with the blowing pipe, the other end of the air vent is communicated with the guide pipe, the projection area of the limiting block in the axial direction is larger than that of a sleeve hole of the blowing pipe sleeve in the axial direction, and one end of the third spring is abutted against the limiting block while the other end of the third spring is abutted against the inner side wall of the accommodating cavity.

7. The workpiece inspection apparatus of claim 1, wherein the vent end face is a vent plane for mating with a conforming end face of a workpiece.

8. The workpiece inspection apparatus according to claim 1, wherein the moving mechanism includes a horizontal moving assembly and a moving mounting platform, the horizontal moving assembly is mounted to the moving mounting platform, and the air blowing mechanism is mounted to the horizontal moving assembly to perform movement in a horizontal direction.

9. The workpiece detection device according to claim 8, wherein the horizontal moving assembly comprises a horizontal driving cylinder, the horizontal driving cylinder is fixedly mounted on a movable mounting platform, and the detection mounting platform is connected with an output end of the horizontal driving cylinder.

10. The workpiece detection device according to claim 1, wherein the height detection mechanism comprises a height detection platform, the output end of the driving mechanism is fixedly connected with the height detection platform, the screw abutting piece is movably mounted on the height detection platform, and the screw detection unit is arranged on the height detection platform and used for detecting the position of the screw abutting piece relative to the height detection platform.

11. The workpiece detection device according to claim 10, wherein the screw abutting member is a screw abutting column, the height detection platform is provided with at least one guide hole, the screw abutting column is slidably disposed in the guide hole, and the screw detection unit is disposed at one end of the guide hole.

12. The workpiece detection device according to claim 11, wherein a second spring is sleeved on the screw abutting column, and one end of the second spring is fixedly connected with the screw abutting column or the height detection platform.

13. The workpiece detection apparatus according to claim 11 or 12, wherein an outer peripheral wall of the screw abutment post is provided with an annular projection for detection by the screw detection unit.

14. The workpiece detection device according to claim 1, further comprising an automatic feeding mechanism for continuously conveying the positioning tool, wherein the positioning tool is placed on the automatic feeding mechanism to move.

15. The workpiece inspection apparatus of claim 14, further comprising a workpiece inspection system comprising:

a control unit;

16. The workpiece detection apparatus according to claim 1, further comprising an abnormal workpiece storage platform provided with the storage detection unit.