A workpiece detection device

Abstract

The present invention relates to the technical field of workpiece detection, and particularly to a workpiece detection device, which includes a positioning tooling, a workpiece end face detection device, and a screw assembly detection device. On the one hand, the present invention can blow air by a blow pipe against the end face to be measured of the workpiece, measure the air pressure in the blow pipe through a air pressure detection unit, and compare the detected air pressure value with the qualified air pressure range to judge the fitting degree between the end face to be measured and the air outlet end face of the blow pipe, thereby quickly judging whether the assembly of the workpiece is correct and improving the efficiency of qualified detection of workpiece assembly; on the other hand, a screw assembly detection device is provided, and a screw abutting member is driven by a driving mechanism to abut against one axial end of the screw assembled on the workpiece. At this time, the position where the screw abutting member is located is detected through a screw detection unit, so as to judge whether the screw is assembled in place, improving the reliability of workpiece assembly and the efficiency of qualified detection of product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece detection, and particularly to a workpiece detection device. Background Art

[0002] The device consists of multiple components. During the production process, multiple components need to be assembled according to a fixed fit. Moreover, due to the increasing number of components and the gradually increasing requirements for assembly accuracy, it is difficult to detect the structural differences of some components without careful observation, which easily leads to errors during the assembly process, such as:

[0003] 1) The component has a front side and a back side. The front side is a flat surface, and the back side is a curved surface. The structures of the front side and the back side are different, and it is difficult to detect by manual observation. It is easy to install it in the wrong direction during installation, resulting in the product being unusable after assembly and requiring disassembly and reassembly, wasting manpower and material resources;

[0004] 2) The workpiece has requirements for the structure of the machined surface of the surface, which needs to be a curved surface or a flat surface. When the radian of the curved surface is small, it is difficult for manual judgment.

[0005] In addition, most workpiece assemblies require the use of screws for connection. In products with high precision requirements, there are high requirements for the height of the screw screwed into the workpiece. The prior art generally controls the torque size of the screw being screwed in through an automatic screw tightening device. However, due to the deviation in the machining accuracy of the screw hole and the screw thread, when the torque detected by the automatic screw tightening device is the same, the height difference of the screw screwed into the workpiece is relatively large. Summary of the Invention

[0006] The purpose of the present invention is to provide a workpiece detection device that helps to detect the corresponding end faces of components when the workpiece assembly is correct and whether the assembled screw is screwed in to reach the qualified height, thereby ensuring the quality of product assembly and improving production efficiency.

[0007] To achieve the above purpose, the present invention provides a workpiece detection device, including:

[0008] A positioning tooling for positioning and placing the workpiece;

[0009] A workpiece end face detection device, which includes a blowing mechanism, a pressure detection unit, and a moving mechanism. The blowing mechanism includes a blowing pipe, and the outlet end of the blowing pipe is provided with an outlet end face for fitting with the qualified end face of the workpiece. The pressure detection unit is connected to the blowing pipe to detect the air pressure in the blowing pipe. The blowing mechanism is installed on the moving mechanism; and

[0010] Screw assembly detection device, which includes a height detection mechanism and a driving mechanism. The height detection mechanism includes a screw contact member for contacting the screw to be measured of the workpiece and a screw detection unit for detecting the position of the screw contact member when it contacts the screw to be measured. The height detection mechanism is connected to the output end of the driving mechanism to drive the height detection mechanism to move along the axial direction of the screw to be measured.

[0011] Optionally, the positioning tooling includes at least two positioning pins for inserting into the positioning holes of the workpiece.

[0012] Optionally, the air blowing mechanism further includes a detection mounting platform and an elastic assembly component. The air blowing pipe is movably mounted on the detection mounting platform through the elastic assembly component.

[0013] Optionally, the elastic assembly component includes:

[0014] A movable mounting plate, which is provided with a receiving channel. The air blowing pipe is sleeved in the receiving channel, and a third spring is arranged at the rear end of the air blowing pipe and connected to the detection mounting platform;

[0015] A guide rod, one end of which is fixedly connected to the movable mounting plate, and the other end passes through the detection mounting platform and is slidably connected to the detection mounting platform; and

[0016] A first spring, which is sleeved outside the guide rod. One end of the first spring abuts against the movable mounting plate, and the other end abuts against the detection mounting platform.

[0017] Optionally, the detection mounting platform includes:

[0018] A connecting block, which is provided with a receiving cavity. A guide groove communicating with the receiving cavity is formed on the upper end surface of the connecting block, and an air blowing pipe sleeve communicating with the receiving cavity is formed on the front end surface of the connecting block;

[0019] A guide pipe, which passes through the guide groove and can slide along the extension direction of the guide groove. One end is communicated with the air pressure detection unit, and the other end is communicated with the air blowing pipe;

[0020] Wherein, the air blowing pipe passes through the air blowing pipe sleeve, and one end of the third spring abuts against the air blowing pipe and the other end abuts against the inner side wall of the receiving cavity.

[0021] Optionally, a limiting block is arranged at the rear end of the air blowing pipe. The limiting block is provided with a ventilation hole. One end of the ventilation hole is communicated with the air blowing pipe, and the other end is communicated with the guide pipe. The projected area of the limiting block in the axial direction is larger than the projected area of the sleeve hole of the air blowing pipe sleeve. One end of the third spring abuts against the limiting block and the other end abuts against the inner side wall of the receiving cavity.

[0022] Optionally, the air outlet end face is an air outlet plane for fitting with the qualified end face of the workpiece.

[0023] Optionally, the moving mechanism includes a horizontal moving component and a moving mounting platform. The horizontal moving component is mounted on the moving mounting platform, and the air blowing mechanism is mounted on the horizontal moving component to move in the horizontal direction.

[0024] Optionally, the horizontal moving component includes a horizontal driving cylinder. The horizontal driving cylinder is fixedly mounted on the moving mounting platform, and the detection mounting platform is connected to the output end of the horizontal driving cylinder.

[0025] Optionally, the height detection mechanism includes a height detection platform. The output end of the driving mechanism is fixedly connected to the height detection platform. The screw abutting member is movably mounted on the height detection platform, and the screw detection unit is arranged on the height detection platform to detect the position of the screw abutting member relative to the height detection platform.

[0026] Optionally, the screw abutting member is a screw abutting column. At least one guiding hole is formed in the height detection platform, and the screw abutting column slidably penetrates through the guiding hole. The screw detection unit is arranged at one end of the guiding hole.

[0027] Optionally, a second spring is sleeved on the screw abutting column, and one end of the second spring is fixedly connected to the screw abutting column or the height detection platform.

[0028] Optionally, an annular protrusion for detection by the screw detection unit is arranged on the outer peripheral wall of the screw abutting column.

[0029] Optionally, it further includes an automatic feeding mechanism for continuously conveying the positioning tooling. The positioning tooling is placed on the automatic feeding mechanism for movement.

[0030] Optionally, it further includes a workpiece detection system, which includes:

[0031] A feeding detection unit for detecting whether the workpiece reaches the detection position;

[0032] A material blocking mechanism arranged at the discharge end of the automatic feeding mechanism. The material blocking mechanism includes a material blocking switch;

[0033] A storage detection unit for detecting whether an abnormal workpiece is placed in a preset placement position; and

[0034] A control unit;

[0035] Wherein, the air pressure detection unit, the screw detection unit, the feeding detection unit, the material blocking switch and the storage detection unit are all electrically connected to the control unit.

[0036] Optionally, it further includes an abnormal workpiece storage platform, and the storage detection unit is provided on the abnormal workpiece storage platform.

[0037] Implementing the embodiments of the present invention has the following technical effects:

[0038] On the one hand, the present invention can blow air by fitting the air blowing pipe to the end face to be measured of the workpiece. Since the fitting degrees of the qualified end face and the unqualified end face of the end face to be measured of the workpiece with the air blowing pipe are different, the air pressure in the air blowing pipe is measured by the air pressure detection unit, and the fitting degree between the end face to be measured and the air outlet end face of the air blowing pipe is judged by comparing the detected air pressure value with the qualified air pressure range, so as to judge whether the end face to be measured of the workpiece is a qualified end face, and accordingly quickly judge whether the assembly of the workpiece is correct, improving the efficiency of detecting the qualified assembly of the workpiece;

[0039] On the other hand, a screw assembly detection device is provided. The driving mechanism drives the screw abutting member to abut against one axial end of the screw assembled on the workpiece. At this time, the position of the screw abutting member is detected by the screw detection unit, so as to judge whether the screw is assembled in place, improving the reliability of workpiece assembly and the efficiency of detecting the qualified product quality;

[0040] Finally, the air blowing mechanism and the height detection mechanism of the present invention are respectively driven by the moving mechanism and the driving mechanism to realize the simultaneous detection of the workpiece end face and the screw assembly height, further improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic structural diagram of a preferred embodiment of the present invention;

[0042] Figure 2 is Figure 1 a schematic structural diagram of the positioning tooling in the shown embodiment;

[0043] Figure 3 is Figure 1 a schematic structural diagram of the workpiece end face detection device in the shown embodiment;

[0044] Figure 4 is Figure 3 an enlarged schematic diagram at A in;

[0045] Figure 5 is Figure 1 a detection schematic diagram of the shown embodiment in cooperation with the workpiece for detecting the end face to be measured;

[0046] Figure 6 is Figure 5 an enlarged schematic diagram at B in;

[0047] Figure 7 is Figure 3 a partial cross-sectional view in the shown embodiment;

[0048] Figure 8 is Figure 1 A structural schematic diagram of the screw assembly detection device in the illustrated embodiment;

[0049] Figure 9 is Figure 8 A structural schematic diagram of the screw abutting member in the illustrated embodiment;

[0050] Figure 10 is Figure 1 A detection schematic diagram for detecting the screw height in cooperation with the workpiece in the illustrated embodiment;

[0051] Figure 11 is Figure 1 A control principle block diagram of the workpiece detection device in the illustrated embodiment;

[0052] Figure 12 is Figure 1 A front view of the workpiece to be detected in the illustrated embodiment;

[0053] Figure 13 is Figure 12 A partial cross-sectional view of the illustrated workpiece.

[0054] Explanation of reference numerals:

[0055] 100, positioning tooling, 110, positioning pin;

[0056] 200, workpiece end face detection device, 210, air blowing mechanism, 211, air blowing pipe, 211a, air outlet end face, 212, detection installation platform, 212a, connecting block, 212b, guide groove, 212c, air blowing pipe sleeve, 212d, guide pipe, 212e, limiting block, 213, elastic assembly component, 213a, movable installation plate, 213b, guide rod, 213c, first spring, 213d, arc end face, 213e, annular nozzle, 213f, third spring, 220, air pressure detection unit, 230, moving mechanism, 231, horizontal driving cylinder, 232, moving installation platform;

[0057] 300, screw assembly detection device, 310, height detection mechanism, 311, screw abutting member, 311a, annular protrusion, 312, screw detection unit, 313, height detection platform, 314, second spring, 320, driving mechanism;

[0058] 400, automatic feeding mechanism, 410, conveying roller;

[0059] 500, Workpiece detection system, 510, Feeding detection unit, 520, Material blocking mechanism, 521, Material blocking switch, 530, Storage detection unit, 540, Control unit, 550, Screw height anomaly counter display, 560, End face to be measured anomaly counter display, 570, Screw height anomaly alarm indicator light, 580, End face to be measured anomaly alarm indicator light;

[0060] 600, Abnormal workpiece storage platform;

[0061] 700, Workpiece, 710, Slide piece, 711, End face to be measured, 720, Screw. Specific implementation manners

[0062] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0063] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0064] In addition, in the present invention, terms such as "first" and "second" are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0065] Reference Figure 1 - Figure 13 , An embodiment of the present invention provides a workpiece detection device, including a positioning tooling 100, a workpiece end face detection device 200, and a screw assembly detection device 300.

[0066] Among them, reference Figure 2 , The positioning tooling 100 is used for positioning and placing the workpiece;

[0067] Reference Figure 3 - Figure 7, the workpiece end face detection device 200 includes a blowing mechanism 210, a pneumatic pressure detection unit 220, and a moving mechanism 230. The blowing mechanism 210 includes a blowing pipe 211, and an air outlet end face 211a for fitting with the qualified end face of the workpiece is provided at the air outlet end of the blowing pipe 211. The pneumatic pressure detection unit 220 is connected to the blowing pipe 211 to detect the pneumatic pressure in the blowing pipe 211, and the blowing mechanism 210 is installed on the moving mechanism 230; and

[0068] Reference Figure 8 - Figure 10 , the screw assembly detection device 300 includes a height detection mechanism 310 and a driving mechanism 320. The height detection mechanism 310 includes a screw abutting member 311 for abutting against the screw to be measured of the workpiece and a screw detection unit 312 for detecting the position when the screw abutting member 311 abuts against the screw to be measured. The height detection mechanism 310 is connected to the output end of the driving mechanism 320 to drive the height detection mechanism 310 to move along the axial direction of the screw to be measured.

[0069] In this way, on the one hand, the present invention can blow air by fitting the blowing pipe 211 to the end face to be measured of the workpiece. Since the fitting degrees of the qualified end face and the unqualified end face of the end face to be measured of the workpiece with the blowing pipe 211 are different, the pneumatic pressure in the blowing pipe 211 is measured by the pneumatic pressure detection unit 220, and the measured pneumatic pressure value is compared with the qualified pneumatic pressure range to judge the fitting degree of the end face to be measured with the air outlet end face 211a of the blowing pipe 211, so as to judge whether the end face to be measured of the workpiece is a qualified end face, and accordingly quickly judge whether the assembly of the workpiece is correct, improving the efficiency of the qualified detection of the workpiece assembly;

[0070] On the other hand, the screw assembly detection device 300 is provided. The driving mechanism 320 drives the screw abutting member 311 to abut against one axial end of the screw assembled on the workpiece. At this time, the position of the screw abutting member 311 is detected by the screw detection unit 312, so as to judge whether the screw is assembled in place, improving the reliability of the workpiece assembly and the efficiency of the qualified detection of the product quality.

[0071] It should be noted that the screw assembly detection device 300 of the present invention can not only be used for the detection of the screw height, but also for the height detection when other assembled parts cooperate with the assembled main body.

[0072] Furthermore, reference Figure 2 , the positioning tooling 100 in an embodiment provided by the present invention includes at least two positioning pins 110 for inserting into the positioning holes of the workpiece. While positioning the workpiece through the two positioning pins 110, the workpiece is limited to prevent the workpiece from rotating around the axial direction of the positioning pins 110.

[0073] Specifically, reference Figure 3, To avoid the rigid collision between the air blowing pipe 211 and the end face to be measured, and to make the air outlet end face 211a of the air blowing pipe 211 abut against the end face to be measured according to different distances of the end face to be measured, the air blowing mechanism 210 in this embodiment further includes a detection installation platform 212 and an elastic assembly component 213. The air blowing pipe 211 is movably installed on the detection installation platform 212 through the elastic assembly component 213, so as to adjust the position of the air blowing pipe 211 when it abuts against the end face to be measured through the elastic assembly component 213, and improve the stability and reliability of the use of the air blowing pipe 211.

[0074] Among them, referring to Figure 3 - Figure 7 , the elastic assembly component 213 in this embodiment includes:

[0075] A movable mounting plate 213a, the movable mounting plate 213a is provided with a receiving channel, the air blowing pipe 211 is sleeved in the receiving channel, a third spring 213f is provided at the rear end of the air blowing pipe 211 and is connected to the detection installation platform 212, and a ring-shaped nozzle 213e integrally formed with the movable mounting plate is provided at the nozzle of the receiving channel;

[0076] A guide rod 213b, one end of which is fixedly connected to the movable mounting plate 213a, and the other end passes through the detection installation platform 212 and is slidably connected to the detection installation platform 212, so that when the detection installation platform 212 and the movable mounting plate 213a move relative to the workpiece, they move along the axial direction of the guide rod 213b, improving the stability of the movement of the air blowing pipe 211; and

[0077] A first spring 213c, which 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 installation platform 212. Through the deformation of the spring and the elastic potential energy generated by the deformation, the movable mounting plate 213a is always kept in abutment with the end face to be measured, and at the same time, rigid collision when the movable mounting plate 213a contacts the workpiece is avoided.

[0078] Specifically, referring to Figure 7 , the detection installation platform 212 includes:

[0079] A connecting block 212a, which is provided with a receiving cavity, a guide groove 212b communicating with the receiving cavity is opened on the upper end face of the connecting block 212a, and a blowing pipe sleeve 212c communicating with the receiving cavity is formed on the front end face of the connecting block 212a;

[0080] A guide pipe 212d, which passes through the guide groove 212b and can slide along the extending direction of the guide groove 212b, one end is communicated with the air pressure detection unit 220, and the other end is communicated with the air blowing pipe 211;

[0081] Among them, the blowing pipe 211 is inserted into the blowing pipe sleeve 212c. One end of the third spring 213f abuts against the blowing pipe 211, and the other end abuts against the inner side wall of the accommodating cavity.

[0082] In this way, it helps to protect the blowing pipe 211 through the blowing pipe sleeve 212c, avoiding the blowing pipe 211 from being collided by foreign objects. In addition, the guiding pipe 212d is restricted to slide along the extending direction of the guiding groove, further restricting the moving direction of the blowing pipe 211 and improving the stability of the movement of the blowing pipe 211.

[0083] Furthermore, a limiting block 212e is provided at the rear end of the blowing pipe 211. The limiting block 212e is provided with a ventilation hole. One end of the ventilation hole is communicated with the blowing pipe 211, and the other end is communicated with the guiding pipe 212d. The projected area of the limiting block 212e in the axial direction is larger than the projected area of the sleeve hole of the blowing pipe sleeve 212c in the axial direction. One end of the third spring 213f abuts against the limiting block 212e, and the other end abuts against the inner side wall of the accommodating cavity. On the one hand, connecting the blowing pipe 211 and the guiding pipe 212d through the limiting block 212e facilitates the assembly and disassembly of the limiting block 212e, the blowing pipe 211 and the guiding pipe 212d, so that each component can be replaced separately after being damaged, reducing the replacement cost. Specifically, the blowing pipe 211 and the guiding pipe 212d are both connected to the limiting block 212e by a threaded connection method to achieve detachable replacement. On the other hand, by providing the limiting block 212e and the projected area of the limiting block 212e in the axial direction is larger than the projected area of the sleeve hole of the blowing pipe sleeve 212c in the axial direction, the moving range of the limiting block 212e is restricted within the accommodating cavity, thereby preventing the blowing pipe connected to the limiting block 212e from disengaging from the accommodating cavity, making the use safer and more reliable.

[0084] Among them, the movable mounting plate 213a in this embodiment is provided with an arc-shaped end face 213d that fits the workpiece 700.

[0085] Thus, when the blow pipe 211 contacts the end face to be measured, first, the moving mechanism 230 drives the detection mounting platform 212 and the movable mounting plate 213a to move towards the workpiece. When the arc-shaped end face 213d of the movable mounting plate 213a fits against the outer peripheral wall of the workpiece, the moving mechanism 230 drives the detection mounting platform 212 to continue moving, pushing the blow pipe 211 out of the accommodation channel and pressing it against the end face to be measured. At the same time, when the blow pipe 211 abuts against the end face to be measured, it is buffered by the third spring 213f and stably abuts against the end face to be measured. When the third spring 213f deforms and buffers, the guide pipe 212d and the blow pipe 211 slide synchronously along the extension direction of the guide groove 212b. In addition, the arc-shaped end face 213d fits against the outer peripheral wall of the workpiece 700 to determine the relative position between the blow pipe 211 and the workpiece 700 when the blow pipe 211 approaches the workpiece 700, and improve the reliability of the relative position between the blow pipe 211 and the workpiece 700 during the measurement process, thereby ensuring the stability of the blow pipe 211 during the air blowing process. Moreover, when the blow pipe 211 is not working, it is accommodated in the accommodation channel and the blow pipe sleeve 212c to protect the blow pipe 211.

[0086] Furthermore, in this embodiment, a perforation is provided on the outer side wall of the workpiece. Before the blow pipe 211 enters the perforation, it is first aligned with the perforation through the annular nozzle 213e, and then the blow pipe 211 contacts the end face to be measured through the perforation, thereby improving the position accuracy of the blow pipe 211 entering.

[0087] Specifically, referring to Figure 4 , the air outlet end face 211a in this embodiment is an air outlet plane for fitting against the qualified end face of the workpiece. The qualified end face of the end face to be measured in this embodiment is a plane, and the unqualified end face is an arc surface. Therefore, when the air outlet end face 211a of the blow pipe 211 abuts against the end face to be measured, if the air pressure value detected and obtained by the air pressure detection unit 220 is less than the qualified air pressure range, it is considered that the end face to be measured is an unqualified end face and the component assembly is incorrect. At this time, the air outlet plane abuts against the arc surface, and there is a gap between the air outlet plane and the arc surface; if the air pressure value detected and obtained by the air pressure detection unit 220 is within the qualified air pressure range, it is considered that the end face to be measured is a qualified end face and the component assembly is correct. At this time, the air outlet plane fits against the plane.

[0088] Furthermore, referring to Figure 3 , in order to enable the blow pipe 211 to move horizontally to abut against the end face to be measured in this embodiment, the moving mechanism 230 of this embodiment includes a horizontal moving component and a moving mounting platform 232. The horizontal moving component is installed on the moving mounting platform 232, and the blowing mechanism 210 is installed on the horizontal moving component to perform horizontal movement.

[0089] Specifically, the horizontal movement component in this embodiment includes a horizontal driving cylinder 231. The horizontal driving cylinder 231 is fixedly installed on the moving installation platform 232, and the detection installation platform 212 is connected to the output end of the horizontal driving cylinder 231.

[0090] Further, referring to Figure 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 setting of the screw detection unit 312 and the screw abutting member 311. Among them, the output end of the driving mechanism 320 is fixedly connected to the height detection platform 313. The screw abutting member 311 is movably installed on the height detection platform 313, and the screw detection unit 312 is arranged on the height detection platform 313 to detect the position of the screw abutting member 311 relative to the height detection platform 313.

[0091] The screw abutting member 311 in this embodiment is a screw abutting column. The height detection platform 313 is provided with at least one guiding hole. The screw abutting column slidably penetrates through the guiding hole, so that the stability of the screw abutting member 311 when sliding along the axial direction of the guiding hole is better, and the screw detection unit 312 is arranged at one end of the guiding hole, which is convenient for detecting the position of the screw abutting member 311 relative to the height detection platform 313.

[0092] Further, referring to Figure 9 , a second spring 314 is sleeved on the screw abutting column. One end of the second spring 314 is fixedly connected to the screw abutting column or the height detection platform 313, so that the screw abutting column can abut against the screw to be measured under the drive of the driving mechanism 320 and avoid rigid collision with the screw to be measured.

[0093] In order for the screw detection unit 312 to detect the relative position between the screw abutting column and the height detection platform 313 within a certain range, an annular protrusion 311a for the screw detection unit 312 to detect is provided on the outer peripheral wall of the screw abutting column in this embodiment. By detecting whether the annular protrusion 311a moves into the detection range by the screw detection unit 312, the position of the screw abutting column is judged. Specifically, the axial thickness of the annular protrusion 311a can be set to preset the detection range value of the screw detection unit 312, allowing the installation error of the screw to be measured to be within the axial thickness range of the annular protrusion 311a. Among them, the axial thickness of the annular protrusion 311a in this embodiment is 0.2 mm - 0.5 mm.

[0094] Referring to Figure 1One embodiment of the present invention further includes an automatic feeding mechanism 400 for continuously conveying the positioning tooling 100. The positioning tooling 100 is placed on the automatic feeding mechanism 400 for movement. Specifically, the automatic feeding mechanism 400 in this embodiment includes a plurality of parallel arranged conveying rollers 410. The positioning tooling 100 is disposed on the conveying rollers 410 and is driven to move by the rotation of the conveying rollers 410.

[0095] For further reference, Figure 11 The workpiece detection device in this embodiment further includes a workpiece detection system 500, which includes:

[0096] A feeding detection unit 510, which is used to detect whether the workpiece reaches the detection position;

[0097] A material blocking mechanism 520, which is disposed at the material discharging end of the automatic feeding mechanism 400, and the material blocking mechanism 520 includes a material blocking switch 521;

[0098] A storage detection unit 530, which is used to detect whether an abnormal workpiece is placed in a preset placement position; and

[0099] Control unit 540;

[0100] Among them, the air pressure detection unit 220 , the screw detection unit 312 , the feeding detection unit 510 , the material stop switch 521 and the storage detection unit 530 are all electrically connected to the control unit 540 .

[0101] Furthermore, the control unit 540 is connected to and controls the blowing mechanism 210 , the moving mechanism 230 , the driving mechanism 320 and the automatic feeding mechanism 400 , thereby realizing the automatic operation of the workpiece detection equipment.

[0102] refer to Figure 1 The workpiece detection device further includes an abnormal workpiece storage platform 600 , and the abnormal workpiece storage platform 600 is provided with a storage detection unit 530 .

[0103] For further reference, Figure 1 and Figure 11 In order to facilitate the counting of the number of workpieces with abnormal screw height and abnormal end faces to be tested, the present embodiment also includes a screw height abnormality counting display 550 and a measured end face abnormality counting display 560. At the same time, in order to facilitate the operator to monitor whether an abnormality occurs, a screw height abnormality alarm indicator 570 and a measured end face abnormality alarm indicator 580 are provided.

[0104] Therefore, based on the workpiece detection device provided in the above embodiments, the workpiece end face detection device 200 is used to detect whether the sliding piece 710 of the workpiece 700 in this embodiment is correctly installed. Among them, the end face 711 to be measured of the sliding piece 710 can be the front or the back. The front is a flat surface, and the back is an arc surface. When correctly installed, the front of the sliding piece 710 should be in contact and fit with the air outlet end face 211a of the air blowing pipe 211. The screw assembly detection device 300 is used to detect the screw 720 installed on the workpiece 700. Its working process is as follows:

[0105] 1. Place the workpiece on the positioning fixture 100 for positioning and position limitation, and the positioning fixture 100 moves on the automatic feeding mechanism 400 to the detection position;

[0106] 2. The feeding detection unit 510 detects whether the workpiece reaches the detection position;

[0107] 3. When the workpiece reaches the detection position, the feeding detection unit 510 feeds back the first detection information to the control unit 540. The horizontal driving cylinder 231 drives the air blowing pipe 211 to move towards the end face to be measured and abut against the end face to be measured. The air supply device supplies air to the air blowing pipe 211. At the same time, 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 measured and abuts against the upper end of the screw to be measured;

[0108] 4. The air pressure detection unit 220 obtains the air pressure value in the air blowing pipe 211, and the screw detection unit 312 detects whether the annular protrusion 311a falls within the detection range;

[0109] When the workpiece is detected to be qualified:

[0110] When the air pressure value detected and obtained by the air pressure detection unit 220 is within the qualified air pressure range, the air pressure detection unit 220 sends the second detection information of qualified detection to the control unit 540. When the screw detection unit 312 detects that the annular protrusion 311a falls within the detection range, the screw detection unit 312 sends the third detection information of qualified detection to the control unit 540. At this time, the control unit 540 controls the automatic feeding mechanism 400 to drive the positioning fixture 100 to move, and controls the material blocking mechanism 520 to be in the release position, so that the workpiece moves to the next processing procedure;

[0111] When the workpiece is detected to be unqualified:

[0112] 1) When the air pressure value detected and obtained by the air pressure detection unit 220 is not within the qualified air pressure range, the air pressure detection unit 220 sends the second detection information of unqualified detection to the control unit 540. The control unit 540 controls the end face to be measured abnormal counting display 560 to display the unqualified ranking value of the current unqualified workpiece, and at the same time the end face to be measured abnormal alarm indicator light 580 lights up;

[0113] When the screw detection unit 312 detects that the annular protrusion 311a does not fall within the detection range, the screw detection unit 312 sends the third detection information indicating unqualified detection to the control unit 540. The control unit 540 controls the screw height abnormality counter display 550 to record the unqualified ranking value of the current unqualified workpiece. At the same time, the screw height abnormality alarm indicator light 570 lights up;

[0114] Among them, when the air pressure detection unit 220 or the screw detection unit 312 feeds back the second detection information or the third detection information indicating unqualified detection to the control unit 540, the material blocking mechanism 520 is controlled to be in the material blocking position to block the current detected workpiece from flowing into the next processing step;

[0115] 2) The control unit 540 sends storage information to the storage detection unit 530;

[0116] 3) When the end face to be measured abnormality alarm indicator light 580 and / or the screw height abnormality alarm indicator light 570 lights up, the operator takes out the workpiece on the positioning tooling 100 blocked by the material blocking mechanism 520 and places it 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 it back to the control unit 540, the control unit 540 controls the screw height abnormality alarm indicator light 570 and / or the end face to be measured abnormality alarm indicator light 580 to go out, and controls the material blocking mechanism 520 to be in the release state.

[0117] Furthermore, the number of the screw abutting members 311 and the screw detection unit 312 in this embodiment can be multiple, so as to be used for simultaneously detecting multiple screws assembled on the workpiece and improving the detection efficiency.

[0118] In summary, on the one hand, the present invention can blow air by the air blowing pipe 211 against the end face to be measured of the workpiece. Since the fitting degrees of the qualified end face and the unqualified end face of the end face to be measured of the workpiece with the air blowing pipe 211 are different, the air pressure in the air blowing pipe 211 is measured by the air pressure detection unit 220, and the measured air pressure value is compared with the qualified air pressure range to judge the fitting degree of the end face to be measured of the workpiece with the air outlet end face 211a of the air blowing pipe 211, so as to judge whether the end face to be measured of the workpiece is a qualified end face, and accordingly quickly judge whether the assembly of the workpiece is correct, improving the efficiency of detecting the qualified assembly of the workpiece;

[0119] On the other hand, a screw assembly detection device 300 is provided. The screw abutting member 311 is driven by the driving mechanism 320 to abut against one axial end of the screw assembled on the workpiece. At this time, the position of the screw abutting member 311 is detected by the screw detection unit 312, so as to judge whether the screw is assembled in place, improving the reliability of the workpiece assembly and the efficiency of detecting the qualified product quality.

[0120] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A workpiece detection device, characterized in that, Comprising: A positioning tooling for positioning and placing a workpiece; A workpiece end face detection device, which includes a blowing mechanism, a air pressure detection unit and a moving mechanism. The blowing mechanism includes a blow pipe, and an air outlet end face for fitting with a qualified end face of the workpiece is provided at the air outlet end of the blow pipe. The air pressure detection unit is connected to the blow pipe for detecting the air pressure in the blow pipe, and the blowing mechanism is installed on the moving mechanism; and A screw assembly detection device, which includes a height detection mechanism and a driving mechanism. The height detection mechanism includes a screw abutting member for abutting against a screw to be measured of the workpiece and a screw detection unit for detecting the position when the screw abutting member abuts against the screw to be measured. The height detection mechanism is connected to the output end of the driving mechanism for driving the height detection mechanism to move along the axial direction of the screw to be measured; The blowing mechanism further includes a detection mounting platform and an elastic assembly component, and the blow pipe is movably installed on the detection mounting platform through the elastic assembly component; The elastic assembly component includes: A movable mounting plate, which is provided with a receiving channel. The blow pipe is sleeved in the receiving channel, and a third spring is arranged at the rear end of the blow pipe and connected to the detection mounting platform; A guide rod, one end of which is fixedly connected to the movable mounting plate, and the other end passes through the detection mounting platform and is slidably connected to the detection mounting platform; and A first spring, which is sleeved outside the guide rod. One end of the first spring abuts against the movable mounting plate, and the other end abuts against the detection mounting platform; The detection mounting platform includes: A connecting block, which is provided with a receiving cavity. A guide groove communicating with the receiving cavity is opened on the upper end face of the connecting block, and a blow pipe sleeve communicating with the receiving cavity is formed on the front end face of the connecting block; A guide pipe, which passes through the guide groove and can slide along the extending direction of the guide groove. One end is communicated with the air pressure detection unit, and the other end is communicated with the blow pipe; Wherein, the blow pipe passes through the blow pipe sleeve, and one end of the third spring abuts against the blow pipe, and the other end abuts against the inner side wall of the receiving cavity.

2. The workpiece detection device according to claim 1, characterized in that, The positioning tooling includes at least two positioning pins for inserting into the positioning holes of the workpiece.

3. The workpiece detection device according to claim 1, characterized in that, A limiting block is arranged at the rear end of the blow pipe. The limiting block is provided with a ventilation hole. One end of the ventilation hole is communicated with the blow pipe, and the other end is communicated with the guide pipe. The projected area of the limiting block in the axial direction is larger than the projected area of the sleeve hole of the blow pipe sleeve in the axial direction. One end of the third spring abuts against the limiting block, and the other end abuts against the inner side wall of the receiving cavity.

4. The workpiece detection device according to claim 1, wherein, The air outlet end face is an air outlet plane for fitting with the qualified end face of the workpiece.

5. The workpiece detection device according to claim 1, wherein The moving mechanism includes a horizontal moving component and a moving mounting platform. The horizontal moving component is installed on the moving mounting platform, and the blowing mechanism is installed on the horizontal moving component to perform horizontal movement.

6. The workpiece detection device according to claim 5, characterized in that, The horizontal moving component includes a horizontal driving cylinder. The horizontal driving cylinder is fixedly installed on the moving mounting platform, and the detection mounting platform is connected to the output end of the horizontal driving cylinder.

7. The workpiece detection device according to claim 1, characterized in that, The height detection mechanism includes a height detection platform. The output end of the driving mechanism is fixedly connected to the height detection platform. The screw abutting member is movably installed on the height detection platform. The screw detection unit is arranged on the height detection platform for detecting the position of the screw abutting member relative to the height detection platform.

8. The workpiece detection device according to claim 7, characterized in that, The screw abutting member is a screw abutting column. At least one guiding hole is formed in the height detection platform. The screw abutting column slidably penetrates through the guiding hole. The screw detection unit is arranged at one end of the guiding hole.

9. The workpiece detection device according to claim 8, characterized in that, A second spring is sleeved on the screw abutting column. One end of the second spring is fixedly connected to the screw abutting column or the height detection platform.

10. The workpiece detection device according to claim 8 or 9, characterized in that, An annular protrusion for the screw detection unit to detect is arranged on the outer peripheral wall of the screw abutting column.

11. The workpiece detection device according to claim 1, characterized in that, An automatic feeding mechanism for continuously conveying the positioning tooling is further included. The positioning tooling is placed on the automatic feeding mechanism for movement.

12. The workpiece detection device according to claim 11, characterized in that, A workpiece detection system is further included, which includes: A feeding detection unit for detecting whether the workpiece reaches the detection position; A material blocking mechanism arranged at the discharging end of the automatic feeding mechanism. The material blocking mechanism includes a material blocking switch; A storage detection unit for detecting whether the abnormal workpiece is placed in the preset placement position; and A control unit; Wherein, the air pressure detection unit, the screw detection unit, the feeding detection unit, the material blocking switch and the storage detection unit are all electrically connected to the control unit.

13. The workpiece detection device according to claim 12, characterized in that, An abnormal workpiece storage platform is further included. The storage detection unit is arranged on the abnormal workpiece storage platform.

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