CN112791995A

CN112791995A - Automatic screening machine for screw defects and working method thereof

Info

Publication number: CN112791995A
Application number: CN202110154444.0A
Authority: CN
Inventors: 陆国中
Original assignee: Taicang Tongli Machinery Equipment Co ltd
Current assignee: Taicang Tongli Machinery Equipment Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-05-14

Abstract

The invention discloses an automatic screw defect detecting and screening machine and a working method thereof. The automatic sieve inspection machine for the screw defects can drive the screw to rotate intermittently through the turntable, so that the defects of the screw are detected and screened, and the detection precision, the universality of the screw detection machine and the diversity of screw defect detection are improved.

Description

Automatic screening machine for screw defects and working method thereof

Technical Field

The invention belongs to the technical field of screw detection, and particularly relates to an automatic screen inspection machine for defects of screws. The invention also relates to a working method of the automatic screening machine for the defects of the screws.

Background

The screw is a tool for fastening machine parts of the object step by utilizing the physics and mathematical principles of the inclined plane circular rotation and the friction force of the object, and is an indispensable industrial necessity in daily life.

The tradition need see through the manual work to the quality screening of screw and go on, and is very time-consuming and accurate inadequately, and there is some mode that provide autofilter and replace manual screening afterwards, and wherein two kinds of autofilter machines of common are sieve separator and image formula screw sieve separator of simple and easy type. The sieve separator of simple and easy type only does the screening of head diameter, the theory of operation adopts a pair of rotation in opposite directions and by the setting for relative distance of high to low slope installation by wide to narrow cylinder, can make the head upwards orderly entering cylinder gap after the screw is lined up through the vibrations dish permutation, at this moment the too big beginning position that will be at the cylinder of screw head diameter drops, head diameter undersize will still not drop at the afterbody of cylinder on the contrary, only the identical screw of just can dropping at the middle part of waiting to screen of head diameter and cylinder gap, thereby reach the purpose according to the screening of head diameter. The screw machine can not screen the overproof screws, can not automatically remove unqualified screws, and can manually remove foreign matters and overproof screws clamped on a track.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide an automatic screening machine for detecting screw flaws, which solves the problems that the screening function of the screw screening machine in the prior art is limited, all unqualified screws cannot be screened out, the automation degree of the screening process is low, and the function is single.

The technical scheme is as follows: an automatic screening machine for screw flaws comprises a screw vibrating disc, a screw feeding unit, a rotary disc, a group of screw rotating units, a screw appearance detecting unit, an unqualified material distributing unit and a machine table, wherein the screw vibrating disc, the screw feeding unit, the rotary disc, the screw appearance detecting unit and the unqualified material distributing unit are all arranged on the machine table, the group of screw rotating units are fixedly arranged on the rotary disc, the group of screw rotating units are arranged in an annular array mode by taking the center of the rotary disc as the center of a circle, the starting end of the screw feeding unit is communicated with a discharge hole of the screw vibrating disc, the tail end of the screw feeding unit is positioned above the screw rotating units, the rotary disc can drive the screw rotating units to sequentially pass through the tail end of the screw feeding unit, the screw appearance detecting unit and the unqualified material distributing unit, and a plurality of screws are arranged in the screw vibrating disc, and screws in the screw vibration disc are conveyed to the screw rotating unit through the screw feeding unit. The automatic sieve inspection machine for the screw defects can drive the screw to rotate intermittently through the turntable, so that the defects of the screw are detected and screened, and the detection precision, the universality of the screw detection machine and the diversity of screw defect detection are improved.

Further, the automatic sieve inspection machine of foretell screw flaw, the screw rotation unit includes the rotatory drive roller of fixed screw, the rotatory drive roller of movable screw, drive arrangement, the rotatory support frame body of screw, a set of reset spring and drive roller interval adjust the cylinder, the rotatory drive roller of fixed screw, the rotatory drive roller of movable screw, drive arrangement and drive roller interval adjust the cylinder all set up on the rotatory support frame body of screw, the rotatory drive roller of fixed screw and the rotatory drive roller of movable screw all are connected with drive arrangement to drive arrangement can drive the rotatory drive roller of fixed screw and the rotatory drive roller of movable screw is rotatory, the rotatory drive roller of fixed screw and the rotatory drive roller symmetry setting of movable screw, screw material loading unit is carried the screw to between the rotatory drive roller of fixed screw and the rotatory drive roller of movable screw, the support frame fixed connection of drive roller interval adjust cylinder and the rotatory drive roller of movable screw, the rotatory drive roller of activity screw passes through support frame and the rotatory support body swing joint of screw, the one end of a set of reset spring is passed through the backup pad and is set up on the rotatory support body of screw to the other end and the support frame of the rotatory drive roller of activity screw of a set of reset spring are connected. The structure of the fixed screw rotating driving roller is the same as that of the movable screw rotating driving roller, the screws are symmetrically arranged between the fixed screw rotating driving roller and the movable screw rotating driving roller from the screw feeding unit, the fixed screw rotating driving roller and the movable screw rotating driving roller are driven to rotate by a driving device, the screws can rotate 360 degrees in the screw appearance detection unit, all detection on the outer surfaces of the screws is completed, the movable screw rotating driving roller and the fixed screw rotating driving roller can be pulled to be separated by the driving roller interval adjusting cylinder, and screening and blanking are performed at the position of the qualified and unqualified material distribution unit.

Further, the automatic sieve machine of examining of foretell screw flaw, drive arrangement includes that rotary drive motor, rotary drive action wheel, gear area, rotary drive follow driving wheel, rotary drive pivot, magnetic gear one, magnetic gear two and magnetic gear three, rotary drive motor and rotary drive action wheel are connected, the rotary drive action wheel is connected from the driving wheel through gear area and rotary drive, rotary drive is connected from driving wheel through key and rotary drive pivot from the driving wheel, the magnetic gear one set is established in the rotary drive pivot, magnetic gear two is connected with the pivot of fixed screw rotary drive roller, magnetic gear three is connected with the pivot of movable screw rotary drive roller. The transmission mode of driving by the first magnetic gear, the second magnetic gear and the third magnetic gear is adopted, so that the movable screw rotating driving roller and the fixed screw rotating driving roller can be separated to finish blanking.

Further, the automatic sieve machine of examining of foretell screw flaw, the screw rotation unit still includes movable support frame and a set of first slider, be equipped with a set of first guide rail on the bottom plate of the screw rotation support body, first slider and first guide rail sliding connection, a set of first slider and movable support frame fixed connection, the rotatory drive roller of activity screw passes through the bearing setting on movable support frame, the piston rod and the movable support frame of drive roller interval adjust cylinder are connected, a set of reset spring's one end and movable support frame are connected.

Further, the automatic sieve machine of examining of foretell screw flaw, the outside cover that the screw rotation supported the support body is equipped with the rectangle casing, the rotatory drive roller of fixed screw, the rotatory drive roller of movable screw, drive arrangement, a set of reset spring and drive roller interval adjust the cylinder all are located the space that the rectangle casing covered and establish, the up end of rectangle casing is equipped with the rectangle through-hole, the length direction setting along the rectangle through-hole of the axis direction of the rotatory drive roller of fixed screw and the rotatory drive roller of movable screw to clearance and rectangle through-hole between the rotatory drive roller of fixed screw and the rotatory drive roller of movable screw are just to setting up.

Further, the aforesaid automatic sieve machine of examining of screw flaw, screw outward appearance detecting element still includes camera support frame, a set of CCD camera and a set of light source, a set of CCD camera is a row at the horizontal direction and sets up on the camera support frame, a set of light source is a row at the horizontal direction and sets up on the camera support frame, a set of CCD camera and a set of light source one-to-one set up to the light source is located the CCD camera under, screw rotation unit is located below the light source horizontal position. In the detection process, a group of CCDs correspond to the screws between the fixed screw rotating driving roller and the movable screw rotating driving roller one by one, so that the screws can be detected one by one.

Further, the automatic sieve inspection machine of foretell screw flaw, be equipped with a set of first through-hole on the carousel, a set of first through-hole and a set of screw rotation unit one-to-one set up, clearance and first through-hole between fixed screw rotation drive roller and the movable screw rotation drive roller are just to setting up.

Further, the automatic screening machine for the screw defects comprises a qualified and unqualified sorting unit, the qualified and unqualified sorting unit comprises a group of qualified and unqualified sorting components, the group of qualified and unqualified sorting components are arranged in a row along the length direction of the first through hole, the lower end part of the screw rotating unit is provided with a group of blanking channels, the group of blanking channels and the group of qualified and unqualified sorting components are arranged in a one-to-one correspondence manner, the blanking channels are communicated with the qualified and unqualified sorting components, the qualified and unqualified sorting components comprise a sorting cylinder, a sorting turning plate and a sorting bin, the sorting bin is arranged on the machine table, the lower end part in the sorting bin is provided with a partition plate, the sorting bin is divided into a qualified product channel and an unqualified product channel by the partition plate, the lower end part of the sorting, the sorting cylinder can drive the sorting turning plate to turn over between the qualified product channel and the unqualified product channel, and the opening at the upper end of the sorting bin is opposite to the blanking channel. Clearance, blanking passageway, qualified unqualified sorting unit one-to-one setting between first through-hole, the rotatory drive roller of fixed screw and the rotatory drive roller of activity screw to can carry out the unloading smoothly with the screw that finishes detecting.

Further, in the automatic sieve inspection machine for the screw defects, the turntable is connected with the cam divider, and the cam divider can drive the turntable to rotate intermittently.

The invention provides a working method of an automatic screening machine for defects of screws, which comprises the following steps:

s1, placing a plurality of screws to be detected in the screw vibration disc, starting the vibration disc, and moving the screws of the vibration disc to the screw feeding unit from the outlet of the screw vibration disc;

s2, screws enter the main slideway through the upper material guide frame, and the clamping jaw air cylinders drive the two material blocking rods above and the material blocking rods below to lift in turn, so that materials are discharged at intervals;

s3, the adjusting cylinder drives the strip-shaped blocks to move in a telescopic mode, so that alternate switching of a first position or a second position is conducted, when the strip-shaped blocks are located at the first position, the two main slideways are communicated with the two branch slideways, when the strip-shaped blocks are located at the second position, the two main slideways are communicated with the other two branch slideways, and therefore the same screws are placed in the four branch slideways;

s4, the screws slide into the arc-shaped slide ways through the guide of the slide ways, and the screws fall one by one under the control of the telescopic cylinder to feed under the action of the interval feeding mechanism;

s5, at the beginning, the fixed screw rotating driving roller is attached to the movable screw rotating driving roller, and a screw falls into the space between the fixed screw rotating driving roller and the movable screw rotating driving roller of the screw rotating unit which is positioned right below the arc-shaped slide way;

s6, rotating the turntable, and rotating the screw rotating unit with the screw to the position of the screw appearance detection unit;

s7, starting the CCD camera, and detecting flaws on the upper surface of the screw between the fixed screw rotating driving roller and the movable screw rotating driving roller;

s8, after detection is finished, starting a rotary driving motor, driving a fixed screw rotary driving roller and a movable screw rotary driving roller to rotate through transmission of a rotary driving wheel, a gear belt, a rotary driving driven wheel, a rotary driving rotating shaft, a magnetic gear I, a magnetic gear II and a magnetic gear III, and further driving the screw between the fixed screw rotary driving roller and the movable screw rotary driving roller to rotate;

s9, continuously repeating the steps S7-S8, carrying out 360-degree flaw detection on the screw, detecting the outer wall, sending qualified and unqualified information of the screw to an upper computer, and recording the qualified and unqualified conditions of the screw by the upper computer;

s10, rotating the turntable, and rotating the screw rotating unit at the position of the screw appearance detection unit to a qualified and unqualified material distribution unit;

s11, the sorting cylinders in the qualified and unqualified sorting assemblies respectively act according to the qualified and unqualified screw conditions recorded by the upper computer;

s12, enabling the qualified screws corresponding to the blanking channel and the sorting cylinder of the qualified and unqualified sorting component corresponding to the blanking channel to push the sorting turning plate to turn over, so that the blanking channel is communicated with the qualified product channel;

s13, pushing a sorting turning plate to turn over by a sorting cylinder of the qualified and unqualified sorting component corresponding to the blanking channel through unqualified screws corresponding to the blanking channel, so that the blanking channel is communicated with the unqualified product channel;

s14, after the sorting cylinder in the qualified and unqualified sorting assembly is finished, a piston rod of the driving roller distance adjusting cylinder extends out to push the movable support frame to move towards the direction far away from the fixed screw rotating driving roller, so that the fixed screw rotating driving roller and the movable screw rotating driving roller are separated;

s15, when the distance between the fixed screw rotating driving roller and the movable screw rotating driving roller is larger than the maximum diameter of the screw, the screw falls from the space between the fixed screw rotating driving roller and the movable screw rotating driving roller and falls along the qualified product channel and the unqualified product channel respectively;

s16, after the screws are screened, the piston rod of the driving roller distance adjusting cylinder is retracted, and the movable support frame moves under the action of a group of reset springs, so that the movable screw rotating driving roller is attached to the outer wall of the fixed screw rotating driving roller;

s17, rotating the turntable, and rotating the screw rotating unit at the position of the qualified and unqualified material distributing unit to the position of the screw feeding unit;

s18, continuously repeating the steps S1-S17, and continuously detecting the defects of the screws.

The working method of the automatic screening machine for the screw flaws is simple and feasible in working principle, high in automation degree in the working process, low in manpower requirement, high in detection efficiency and suitable for industrial large-scale application.

The technical scheme shows that the invention has the following beneficial effects: according to the automatic sieve inspection machine for the screw defects, the screw feeding unit is driven by the turntable to rotate, and automatic feeding, appearance detection, qualified discharging and unqualified discharging of screws are respectively performed through the screw feeding unit, the screw appearance detection unit and the qualified and unqualified discharging unit, wherein the screw appearance detection unit can perform a shooting mechanism for 360-degree defect detection on the screws, so that the screws can be detected comprehensively, the accuracy of detection results can be improved, compared with the existing manual detection, the detection efficiency of multi-angle shooting is higher, and the probability of misjudgment is smaller; in addition, the adopted screw vibrating disk and the screw feeding unit adopt a two-in-four feeding mechanism for a double-outlet vibrating disk, and two slide ways are adopted to adjust and rotate four slide ways, so that the vibrating disk can discharge materials and simultaneously feed four hole sites on the positioning carrier, and the screw feeding efficiency is improved; in addition, the qualified and unqualified material distribution unit can automatically and respectively discharge qualified and unqualified screws according to the detection result of the screw appearance detection unit, so that qualified screw products can be automatically selected.

Drawings

FIG. 1 is a first schematic structural diagram of an automatic screening machine for detecting defects of screws according to the present invention;

FIG. 2 is a front view of the automatic screening machine for defects of screws according to the present invention;

FIG. 3 is a second schematic structural view of an automatic screening machine for detecting defects of screws according to the present invention;

FIG. 4 is a first schematic structural diagram of a screw loading unit and a screw rotating unit according to the present invention;

FIG. 5 is a second schematic structural view of the screw loading unit and the screw rotating unit according to the present invention;

FIG. 6 is a first schematic structural diagram of a screw rotating unit and a qualified and unqualified material distributing unit according to the present invention;

FIG. 7 is a second schematic structural view of a screw rotating unit and a qualified and unqualified material distributing unit according to the present invention;

FIG. 8 is a third schematic structural view of a screw rotating unit and a qualified and unqualified material distributing unit according to the present invention;

FIG. 9 is a fourth schematic structural view of the screw rotating unit and the qualified and unqualified material distributing unit according to the present invention;

FIG. 10 is a schematic structural view of a screw vibrating plate and a screw feeding unit according to the present invention;

FIG. 11 is an isometric view of a screw loading unit according to the present invention;

fig. 12 is a partial enlarged view at a in fig. 11;

FIG. 13 is a schematic view of a partial structure of a screw loading unit according to the present invention;

fig. 14 is a view of the structure of a screw according to the present invention.

In the figure: a screw vibrating disk 101, a screw feeding unit 102, a rotary disk 103, a screw rotating unit 104, a screw appearance detecting unit 105, an unqualified material distributing unit 106, a machine table 107, a fixed screw rotating drive roller 108, a movable screw rotating drive roller 109, a drive device 110, a screw rotating support frame 111, a reset spring 112, a drive roller spacing adjusting air cylinder 113, a rotating drive motor 114, a rotating drive driving wheel 115, a gear belt 116, a rotating drive driven wheel 117, a rotating drive rotating shaft 118, a magnetic gear I119, a magnetic gear II 120, a magnetic gear III 121, a movable support frame 122, a first slide block 123, a rectangular shell 124, a rectangular through hole 125, a camera support frame 126, a camera 127, a light source 128, a first through hole 129, an unqualified sorting component 130, a blanking channel 131, a sorting air cylinder 132, a sorting turning plate 133, a sorting bin 134, a partition plate 135, a qualified product channel, Unqualified product passageway 137, first guide rail 138, stock guide 1, bar hole 11, go up guide frame 2, T shape slide opening 21, main slide 3, divide slide 4, bar piece 5, change material slide 51, adjusting cylinder 51, lower guide frame 7, arc slide 71, striker rod 8, clamping jaw cylinder 81, telescopic cylinder 91, expansion plate 92, inserted bar 93, barrier plate 94.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

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

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

The automatic screen inspection machine for screw defects shown in fig. 1-3 comprises a screw vibration disc 101, a screw feeding unit 102, a rotary disc 103, a set of screw rotating units 104, a screw appearance detecting unit 105, an unqualified material distributing unit 106 and a machine table 107, wherein the screw vibration disc 101, the screw feeding unit 102, the rotary disc 103, the screw appearance detecting unit 105 and the unqualified material distributing unit 106 are all arranged on the machine table 107, the set of screw rotating units 104 are fixedly arranged on the rotary disc 103, the set of screw rotating units 104 are arranged in an annular array mode by taking the center of the rotary disc 103 as the center of a circle, the starting end of the screw feeding unit 102 is communicated with a discharge hole of the screw vibration disc 101, the tail end of the screw feeding unit 102 is positioned above the screw rotating units 104, and the rotary disc 103 can drive the screw rotating units 104 to sequentially pass through the tail end of the screw feeding unit 102, The screw vibration disc 101 is internally provided with a plurality of screws, and the screws in the screw vibration disc 101 are conveyed to the screw rotating unit 104 through the screw feeding unit 102. The dial 103 is connected to a cam divider that drives the dial 103 to rotate intermittently. When the number of the screw rotating units 104 in the structure is three, the cam divider can drive the turntable 103 to rotate 120 degrees every time, so that the screws are placed at the positions of the screw feeding units 102 by the screw rotating units 104, the screws are rotated 120 degrees and then subjected to appearance detection on the whole surfaces of the screws by the screw appearance detection unit 105, the screws are rotated 120 degrees again and then come to the positions of the qualified and unqualified material distribution units 106, and a plurality of qualified screws and unqualified screws on the screw rotating units 104 are respectively conveyed to the positions of the qualified materials and the unqualified materials at the positions of the qualified and unqualified material distribution units 106 according to the defect condition of the screws judged at the positions of the screw appearance detection.

The screw rotating unit 104 shown in fig. 4-6 comprises a fixed screw rotating driving roller 108, a movable screw rotating driving roller 109, a driving device 110, a screw rotating support frame 111, a set of return springs 112 and a driving roller spacing adjusting air cylinder 113, wherein the fixed screw rotating driving roller 108, the movable screw rotating driving roller 109, the driving device 110 and the driving roller spacing adjusting air cylinder 113 are all arranged on the screw rotating support frame 111, the fixed screw rotating driving roller 108 and the movable screw rotating driving roller 109 are all connected with the driving device 110, and the driving device 110 can drive the fixed screw rotating driving roller 108 and the movable screw rotating driving roller 109 to rotate, the fixed screw rotating driving roller 108 and the movable screw rotating driving roller 109 are symmetrically arranged, the screw feeding unit 102 feeds screws between the fixed screw rotating driving roller 108 and the movable screw rotating driving roller 109, drive roller interval adjusting cylinder 113 and the rotatory drive roller 109's of activity screw support frame fixed connection, the rotatory drive roller 109 of activity screw passes through support frame and the rotatory support frame body 111 swing joint of screw, the one end of a set of reset spring 112 is passed through the backup pad setting on the rotatory support frame body 111 of screw to the other end and the rotatory drive roller 109's of activity screw support frame of a set of reset spring 112 are connected.

Wherein, drive arrangement 110 includes rotary drive motor 114, rotary drive action wheel 115, gear area 116, rotary drive follows driving wheel 117, rotary drive pivot 118, magnetic force gear 119, two 120 and three 121 of magnetic force gear, rotary drive motor 114 and rotary drive action wheel 115 are connected, rotary drive action wheel 115 passes through gear area 116 and rotary drive follows driving wheel 117 and connects, rotary drive follows driving wheel 117 and connects through key and rotary drive pivot 118, a 119 covers of magnetic force gear is established on rotary drive pivot 118, two 120 of magnetic force gears and the pivot of fixed screw rotary drive roller 108 are connected, three 121 of magnetic force gears and the pivot of movable screw rotary drive roller 109 are connected.

In addition, the screw rotating unit 104 further includes a movable support frame 122 and a set of first sliding blocks 123, a set of first guide rails 138 is arranged on the bottom plate of the screw rotating support frame body 111, the first sliding blocks 123 are connected with the first guide rails 138 in a sliding manner, the set of first sliding blocks 123 is fixedly connected with the movable support frame 122, the movable screw rotating driving roller 109 is arranged on the movable support frame 122 through a bearing, a piston rod of the driving roller interval adjusting cylinder 113 is connected with the movable support frame 122, and one end of the set of reset spring 112 is connected with the movable support frame 122.

In the above-mentioned structure, the outside cover of screw rotation support body 111 is equipped with rectangle casing 124, the rotatory drive roller 108 of fixed screw, the rotatory drive roller 109 of movable screw, drive arrangement 110, a set of reset spring 112 and drive roller interval adjust the cylinder 113 all are located the space that rectangle casing 124 covered and establish, the up end of rectangle casing 124 is equipped with rectangle through-hole 125, the length direction setting of rectangle through-hole 125 is followed to the axis direction of the rotatory drive roller 108 of fixed screw and the rotatory drive roller 109 of movable screw to clearance and rectangle through-hole 125 between the rotatory drive roller 108 of fixed screw and the rotatory drive roller 109 of movable screw are just to setting up.

The screw appearance detecting unit 105 shown in fig. 3 further includes a camera support frame 126, a set of CCD cameras 127, and a set of light sources 128, the set of CCD cameras 127 are arranged on the camera support frame 126 in a row in the horizontal direction, the set of light sources 128 are arranged on the camera support frame 126 in a row in the horizontal direction, the set of CCD cameras 127 and the set of light sources 128 are arranged in a one-to-one correspondence, the light sources 128 are located right below the CCD cameras 127, and the screw rotating unit 104 is located below the horizontal position of the light sources 128.

As shown in fig. 6 to 9, a set of first through holes 129 is provided on the turntable 103, the set of first through holes 129 and the set of screw rotating units 104 are disposed in one-to-one correspondence, and the gap between the fixed screw rotating driving roller 108 and the movable screw rotating driving roller 109 is disposed opposite to the first through holes 129. The qualified and unqualified material distribution unit 106 comprises a group of qualified and unqualified sorting components 130, the group of qualified and unqualified sorting components 130 are arranged in a row along the length direction of a first through hole 129, the lower end part of the screw rotation unit 104 is provided with a group of blanking channels 131, the group of blanking channels 131 and the group of qualified and unqualified sorting components 130 are arranged in a one-to-one correspondence manner, the blanking channels 131 are communicated with the qualified and unqualified sorting components 130, the qualified and unqualified sorting components 130 comprise a sorting cylinder 132, a sorting turning plate 133 and a sorting bin 134, the sorting bin 134 is arranged on the machine table 107, the lower end part in the sorting bin 134 is provided with a partition plate 135, the partition plate 135 divides the sorting bin 134 into a qualified product channel 136 and an unqualified product channel 137, the lower end part of the sorting turning plate 133 is arranged on the partition plate 135 through a rotating, the sorting cylinder 132 can drive the sorting turning plate 133 to turn over between the qualified product channel 136 and the unqualified product channel 137, and the opening at the upper end of the sorting bin 134 is opposite to the blanking channel 131.

As shown in fig. 10 to 13, the screw feeding unit 102 adopts a two-to-four feeding mechanism, and has the following specific structure: the discharging port is connected with the double-outlet vibrating disk and comprises a material guide plate 1 and an upper material guide frame 2; the material guide plate 1 is obliquely arranged, two main slideways 3 which are arranged at intervals are arranged above the top surface of the material guide plate 1, and four sub slideways 4 which are arranged at intervals are arranged below the material guide plate 1; a strip-shaped hole 11 is formed in the material guide plate 1 and located between the two main slideways 3 and the four branch slideways 4, and a strip-shaped block 5 is connected in the strip-shaped hole 11 in a sliding manner; the top surface of the strip-shaped block 5 is provided with four material transferring slideways 51 which are arranged at intervals, the bottom surface of the material guide plate 1 is provided with an adjusting cylinder 6, and a piston rod of the adjusting cylinder 6 is connected with the strip-shaped block 5; the upper material guide frame 2 is connected above the two main slideways 3, and two T-shaped sliding holes 21 which are arranged at intervals are arranged on the upper material guide frame 2; one end of each of the two T-shaped sliding holes 21 is communicated with two discharge ports of the double-outlet vibrating disc respectively, and the other end of each of the two T-shaped sliding holes is communicated with the two main slideways 3 respectively.

The material guide plate 1 is used for supporting the screw and the upper part of the screw; the upper material guide frame 2 is used for communicating the main slideway 3 with two outlets of the vibration disk; the branch slide ways 4 are used for enabling the screws to slide along, so that the screws enter four hole positions of the positioning carrier; the material transfer slide way 51 on the strip-shaped block 5 is used for adjusting the communication relation between the two main slide ways 3 and the four branch slide ways 4, when the strip-shaped block 5 is positioned at a first position, the two main slide ways 3 are communicated with the two branch slide ways 4, and when the strip-shaped block 5 is positioned at a second position, the two main slide ways 3 are communicated with the other two branch slide ways 4; the adjusting cylinder 6 is used for driving the bar 5 to be in the first position or the second position.

The bottom end of the material guide plate 1 is provided with four lower material guide frames 7 which are respectively arranged corresponding to the four branch slideways 4, each lower material guide frame 7 is internally provided with an arc-shaped slideway 71, each arc-shaped slideway 71 is respectively arranged in a tangent way with the corresponding branch slideways 4, and the cross section of each arc-shaped slideway 71 is in a T shape.

The lower material guide frame 7 is used for changing screws into a vertical feeding state, so that the phenomenon that the screws fly out due to inclined feeding is avoided.

One side of each main slideway 3 is provided with two material blocking rods 8 arranged at intervals along the main slideway 3, and each material blocking rod 8 can slide and penetrate through the material guide plate 1; a clamping jaw air cylinder 81 is connected below the material guide plate 1, and two clamping jaws of the clamping jaw air cylinder 81 are arranged up and down; two material blocking rods 8 positioned above the two main slideways 3 are connected to the clamping jaw below the clamping jaw cylinder 81, and two material blocking rods 8 positioned below the two main slideways 3 are connected to the clamping jaw above the clamping jaw cylinder 81. The clamping jaw air cylinder 81 is used for driving the two material blocking rods 8 above and the material blocking rods 8 below to ascend and descend in turn, so that materials are discharged at intervals, and the distance between the upper material blocking rod 8 and the lower material blocking rod 8 is the same as the diameter of a screw. Adopt clamping jaw cylinder 8 to control stock stop 8 and go up and down in turn, simple structure, it is ingenious, reduce occupation space, save manufacturing cost.

The bottom of arc slide 71 is equipped with interval unloading mechanism.

The interval blanking mechanism comprises a telescopic cylinder 91 and a telescopic plate 92, the telescopic cylinder 91 is connected below the material guide plate 1, one end of the telescopic plate 92 is connected to the piston rod end of the telescopic cylinder 91, the other end of the telescopic plate 92 is provided with four insertion rods 93 arranged at intervals, the four insertion rods 93 are arranged at four positions, the lower material guide frame 7 is correspondingly arranged, and two blocking plates 94 arranged at intervals from top to bottom and from left to right are arranged on each insertion rod 93. The telescopic cylinder 91 is used for driving the two blocking plates 94 on the telescopic plate 92 to block material, so that spaced material discharging is realized, when the telescopic cylinder 91 extends out, the blocking plate 94 above extends into the arc-shaped slideway 71 to prevent material from continuing to be supplied, and the blocking plate 94 below is separated from the arc-shaped slideway 71, so that screws between the two blocking plates 94 slide down to feed.

The working principle is as follows: in the operation process, screws enter the main slideway 3 from the vibrating disk through the upper material guide frame 2, the clamping jaw air cylinder 81 drives the two material blocking rods 8 above and the material blocking rods 8 below to lift in turn so as to discharge materials at intervals,

simultaneously, adjust cylinder 6 drives the flexible removal of bar piece 5 to carry out the switching in turn of primary importance or second position, when bar piece 5 was located the primary importance, two main slides 3 and two branch slides 4 intercommunication wherein, when bar piece 5 was located the second position, two main slides 3 and two other branch slides 4 intercommunication, thereby put the same screw in making four branch slides 4 respectively.

The screws slide into the arc-shaped slide ways 71 under the guidance of the sub-slide ways 4, and are controlled by the telescopic air cylinders 91 to fall one by one to feed under the action of the interval feeding mechanism.

The automatic screening machine for the screw defect can detect the defect of the screw by one structure as shown in fig. 14.

Based on the structure, the working method of the automatic screening machine for the defects of the screws comprises the following steps:

s1, placing a plurality of screws to be detected in the screw vibration disc 101, starting the vibration disc, and moving the screws of the vibration disc to the screw feeding unit 102 from the outlet of the screw vibration disc 101;

s2, screws enter the main slideway 3 through the upper material guide frame 2, and the clamping jaw air cylinder 81 drives the two material blocking rods 8 above and the material blocking rods 8 below to lift in turn, so that materials are discharged at intervals;

s3, the adjusting cylinder 6 drives the strip-shaped blocks 5 to move in a telescopic mode, so that the first position or the second position is switched in turn, when the strip-shaped blocks 5 are located at the first position, the two main slideways 3 are communicated with the two branch slideways 4, and when the strip-shaped blocks 5 are located at the second position, the two main slideways 3 are communicated with the other two branch slideways 4, so that the same screws are placed in the four branch slideways 4 respectively;

s4, the screws slide into the arc-shaped slide ways 71 under the guidance of the sub-slide ways 4, and the screws fall one by one under the control of the telescopic air cylinder 91 to feed under the action of the interval feeding mechanism;

s5, initially, the fixed screw driving roller 108 and the movable screw driving roller 109 are attached to each other, and a screw falls between the fixed screw driving roller 108 and the movable screw driving roller 109 of the screw rotating unit 104 located right below the arc-shaped slide 71;

s6, rotating the turntable 103, and rotating the screw rotating unit 104 with the screw placed to the position of the screw appearance detecting unit 105;

s7, the CCD camera 127 is started to detect the flaws on the upper surface of the screw between the fixed screw rotation driving roller 108 and the movable screw rotation driving roller 109;

s8, after detection is finished, the rotary driving motor 114 is started, the fixed screw rotary driving roller 108 and the movable screw rotary driving roller 109 are driven to rotate through transmission of the rotary driving wheel 115, the gear belt 116, the rotary driving driven wheel 117, the rotary driving rotating shaft 118, the first magnetic gear 119, the second magnetic gear 120 and the third magnetic gear 121, so that screws between the fixed screw rotary driving roller 108 and the movable screw rotary driving roller 109 are driven to rotate, and the CCD camera 127 is started to detect flaws on the upper surfaces of the screws between the fixed screw rotary driving roller 108 and the movable screw rotary driving roller 109;

s10, rotating the turntable 103, and rotating the screw rotating unit 104 at the position of the screw appearance detecting unit 105 to the qualified and unqualified material distributing unit 106;

s11, the sorting air cylinders 132 in the qualified and unqualified sorting assemblies 130 respectively act according to the qualified and unqualified screw conditions recorded by the upper computer;

s12, the qualified screws corresponding to the blanking channel 131, and the sorting cylinder 132 of the qualified and unqualified sorting component 130 corresponding to the blanking channel 131 push the sorting turning plate 133 to turn over, so that the blanking channel 131 is communicated with the qualified product channel 136;

s13, the unqualified screws corresponding to the blanking channel 131 and the sorting cylinder 132 of the qualified and unqualified sorting component 130 corresponding to the blanking channel 131 push the sorting turning plate 133 to turn over, so that the blanking channel 131 is communicated with the unqualified product channel 137;

s14, after the sorting cylinder 132 in the qualified and unqualified sorting assembly 130 finishes acting, the piston rod of the driving roller spacing adjusting cylinder 113 extends out to push the movable support frame 122 to move towards the direction far away from the fixed screw rotating driving roller 108, so that the fixed screw rotating driving roller 108 and the movable screw rotating driving roller 109 are separated;

s15, when the distance between the fixed screw rotating driving roller 108 and the movable screw rotating driving roller 109 is larger than the maximum diameter of the screw, the screw falls from the space between the fixed screw rotating driving roller 108 and the movable screw rotating driving roller 109 and falls along the qualified product channel 136 and the unqualified product channel 137 respectively;

s16, after the screening of the screws is finished, the piston rod of the driving roller distance adjusting cylinder 113 is retracted, and the movable support frame 122 moves under the action of the group of reset springs 112, so that the movable screw rotating driving roller 109 is attached to the outer wall of the fixed screw rotating driving roller 108;

s17, rotating the turntable 103, and rotating the screw rotating unit 104 at the position of the qualified and unqualified material distributing unit 106 to the position of the screw feeding unit 102;

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims

1. The utility model provides an automatic sieve inspection machine of screw flaw which characterized in that: the automatic feeding device comprises a screw vibration disc (101), a screw feeding unit (102), a rotary disc (103), a group of screw rotating units (104), a screw appearance detection unit (105), an unqualified distribution unit (106) and a machine table (107), wherein the screw vibration disc (101), the screw feeding unit (102), the rotary disc (103), the screw appearance detection unit (105) and the unqualified distribution unit (106) are all arranged on the machine table (107), the group of screw rotating units (104) are fixedly arranged on the rotary disc (103), the group of screw rotating units (104) are arranged in an annular array mode by taking the center of the rotary disc (103) as the circle center, the starting end of the screw feeding unit (102) is communicated with the discharge hole of the screw vibration disc (101), the tail end of the screw feeding unit (102) is located above the screw rotating unit (104), and the rotary disc (103) can drive the screw rotating units (104) to sequentially pass through the tail end of the screw feeding unit (102) The screw vibration disc comprises a screw appearance detection unit (105) and a qualified and unqualified material distribution unit (106), wherein a plurality of screws are arranged in a screw vibration disc (101), and the screws in the screw vibration disc (101) are conveyed to a screw rotation unit (104) through a screw feeding unit (102).

2. The automatic screening machine for screw defects according to claim 1, characterized in that: the screw rotating unit (104) comprises a fixed screw rotating driving roller (108), a movable screw rotating driving roller (109), a driving device (110), a screw rotating supporting frame body (111), a group of reset springs (112) and a driving roller interval adjusting cylinder (113), wherein the fixed screw rotating driving roller (108), the movable screw rotating driving roller (109), the driving device (110) and the driving roller interval adjusting cylinder (113) are all arranged on the screw rotating supporting frame body (111), the fixed screw rotating driving roller (108) and the movable screw rotating driving roller (109) are all connected with the driving device (110), the driving device (110) can drive the fixed screw rotating driving roller (108) and the movable screw rotating driving roller (109) to rotate, and the fixed screw rotating driving roller (108) and the movable screw rotating driving roller (109) are symmetrically arranged, screw material loading unit (102) are carried the screw to between rotatory drive roller of fixed screw (108) and the rotatory drive roller of activity screw (109), drive roller interval adjusting cylinder (113) and the support frame fixed connection of the rotatory drive roller of activity screw (109), the rotatory drive roller of activity screw (109) support frame body (111) swing joint through support frame and screw rotation, the one end of a set of reset spring (112) is passed through the backup pad setting on the rotatory support frame body of screw (111) to the other end of a set of reset spring (112) and the support frame of the rotatory drive roller of activity screw (109) are connected.

3. The automatic screening machine for screw defects according to claim 2, characterized in that: the driving device (110) comprises a rotary driving motor (114), a rotary driving wheel (115), a gear belt (116), a rotary driving driven wheel (117), a rotary driving rotating shaft (118), a magnetic gear I (119), a magnetic gear II (120) and a magnetic gear III (121), the rotary driving motor (114) is connected with a rotary driving wheel (115), the rotary driving wheel (115) is connected with a rotary driving driven wheel (117) through a gear belt (116), the rotary driving driven wheel (117) is connected with a rotary driving rotating shaft (118) through a key, the first magnetic gear (119) is sleeved on the rotary driving rotating shaft (118), the second magnetic gear (120) is connected with the rotating shaft of the fixed screw rotary driving roller (108), and the third magnetic gear (121) is connected with a rotating shaft of the movable screw rotating driving roller (109).

4. The automatic screening machine for screw defects according to claim 2 or 3, characterized in that: screw rotation unit (104) still includes movable support frame (122) and a set of first slider (123), be equipped with a set of first guide rail (138) on the bottom plate of screw rotation support frame body (111), first slider (123) and first guide rail (138) sliding connection, a set of first slider (123) and movable support frame (122) fixed connection, the rotatory drive roller of activity screw (109) pass through the bearing setting on movable support frame (122), the piston rod and the movable support frame (122) of drive roller interval adjusting cylinder (113) are connected, the one end and the movable support frame (122) of a set of reset spring (112) are connected.

5. The automatic screening machine for screw defects according to claim 2 or 3, characterized in that: the outside cover of screw rotation support body (111) is equipped with rectangle casing (124), the rotatory drive roller of fixed screw (108), the rotatory drive roller of activity screw (109), drive arrangement (110), a set of reset spring (112) and drive roller interval adjust the cylinder (113) all are located the space that rectangle casing (124) covered and establish, the up end of rectangle casing (124) is equipped with rectangle through-hole (125), the length direction setting of rectangle through-hole (125) is followed to the axis direction of the rotatory drive roller of fixed screw (108) and the rotatory drive roller of activity screw (109) to clearance and rectangle through-hole (125) between the rotatory drive roller of fixed screw (108) and the rotatory drive roller of activity screw (109) are just to setting up.

6. The automatic screening machine for screw defects according to claim 1, characterized in that: the screw appearance detection unit (105) further comprises a camera support frame (126), a group of CCD cameras (127) and a group of light sources (128), the group of CCD cameras (127) are arranged on the camera support frame (126) in a row in the horizontal direction, the group of light sources (128) are arranged on the camera support frame (126) in a row in the horizontal direction, the group of CCD cameras (127) and the group of light sources (128) are arranged in a one-to-one correspondence mode, the light sources (128) are located right below the CCD cameras (127), and the screw rotation unit (104) is located below the horizontal position of the light sources (128).

7. The automatic screening machine for screw defects according to claim 2, characterized in that: be equipped with a set of first through-hole (129) on carousel (103), a set of first through-hole (129) and a set of screw rotation unit (104) one-to-one set up, the clearance between rotatory drive roller of fixed screw (108) and the rotatory drive roller of activity screw (109) is just to setting up with first through-hole (129).

8. The automatic screening machine for screw defects according to claim 7, characterized in that: the qualified and unqualified material distribution unit (106) comprises a group of qualified and unqualified sorting components (130), the group of qualified and unqualified sorting components (130) are arranged in a row along the length direction of a first through hole (129), the lower end part of the screw rotating unit (104) is provided with a group of blanking channels (131), the group of blanking channels (131) and the group of qualified and unqualified sorting components (130) are arranged in a one-to-one correspondence manner, the blanking channels (131) are communicated with the qualified and unqualified sorting components (130), the qualified and unqualified sorting components (130) comprise a sorting cylinder (132), a sorting turning plate (133) and a sorting bin (134), the sorting bin (134) is arranged on the machine table (107), the lower end part in the sorting bin (134) is provided with a partition plate (135), and the partition plate (135) divides the sorting bin (134) into a qualified product channel (136), the lower end part of the sorting turning plate (133) is arranged on the partition plate (135) through a rotating shaft, the rotating shaft of the sorting turning plate (133) extends out of the sorting bin (134) to be connected with a piston rod of the sorting cylinder (132), the sorting cylinder (132) can drive the sorting turning plate (133) to turn over between the qualified product channel (136) and the unqualified product channel (137), and an opening in the upper end of the sorting bin (134) is opposite to the blanking channel (131).

9. The automatic screening machine for screw defects according to claim 1, characterized in that: the rotary disc (103) is connected with a cam divider, and the cam divider can drive the rotary disc (103) to rotate intermittently.

10. The working method of the automatic screening machine for the defects of the screws is characterized in that: the method comprises the following steps:

s1, placing a plurality of screws to be detected in the screw vibration disc (101), starting the vibration disc, and moving the screws of the vibration disc to the screw feeding unit (102) from the outlet of the screw vibration disc (101);

s2, screws enter the main slide way (3) through the upper material guide frame (2), and the clamping jaw air cylinder (81) drives the two material blocking rods (8) above and the material blocking rods (8) below to lift in turn, so that materials are discharged at intervals;

s3, the adjusting cylinder (6) drives the strip-shaped block (5) to move in a telescopic mode, so that the first position or the second position is switched in turn, when the strip-shaped block (5) is located at the first position, the two main slideways (3) are communicated with the two branch slideways (4), when the strip-shaped block (5) is located at the second position, the two main slideways (3) are communicated with the other two branch slideways (4), and therefore the same screws are placed in the four branch slideways (4) respectively;

s4, the screws slide into the arc-shaped slide ways (71) under the guidance of the sub-slide ways (4), and the screws fall one by one under the control of the telescopic cylinder (91) to feed under the action of the interval feeding mechanism;

s5, initially, the fixed screw rotating driving roller (108) is attached to the movable screw rotating driving roller (109), and a screw falls into a space between the fixed screw rotating driving roller (108) and the movable screw rotating driving roller (109) of the screw rotating unit (104) which is positioned right below the arc-shaped slide way (71);

s6, rotating the turntable (103), and rotating the screw rotating unit (104) with the screw placed to the position of the screw appearance detecting unit (105);

s7, starting a CCD camera (127) to detect the flaws on the upper surface of the screw between the fixed screw rotating driving roller (108) and the movable screw rotating driving roller (109);

s8, after detection is finished, starting a rotary driving motor (114), driving a fixed screw rotary driving roller (108) and a movable screw rotary driving roller (109) to rotate through transmission of a rotary driving wheel (115), a gear belt (116), a rotary driving driven wheel (117), a rotary driving rotating shaft (118), a magnetic gear I (119), a magnetic gear II (120) and a magnetic gear III (121), so as to drive screws between the fixed screw rotary driving roller (108) and the movable screw rotary driving roller (109) to rotate, starting a CCD camera (127), and detecting flaws on the upper surface of the screws between the fixed screw rotary driving roller (108) and the movable screw rotary driving roller (109);

s10, rotating the turntable (103) to rotate the screw rotating unit (104) at the position of the screw appearance detecting unit (105) to the qualified and unqualified material distributing unit (106);

s11, the sorting cylinders (132) in the group of qualified and unqualified sorting assemblies (130) respectively act according to the qualified and unqualified screw conditions recorded by the upper computer;

s12, qualified screws corresponding to the blanking channel (131), and sorting cylinders (132) of qualified and unqualified sorting components (130) corresponding to the blanking channel (131) push the sorting turning plates (133) to turn over, so that the blanking channel (131) is communicated with the qualified product channel (136);

s13, an unqualified screw corresponding to the blanking channel (131), and a sorting cylinder (132) of a qualified and unqualified sorting component (130) corresponding to the blanking channel (131) push a sorting turning plate (133) to turn over, so that the blanking channel (131) is communicated with an unqualified product channel (137);

s14, after the sorting cylinder (132) in the qualified and unqualified sorting assembly (130) finishes acting, a piston rod of the driving roller distance adjusting cylinder (113) extends out to push the movable support frame (122) to move towards the direction far away from the fixed screw rotating driving roller (108), so that the fixed screw rotating driving roller (108) and the movable screw rotating driving roller (109) are separated;

s15, when the distance between the fixed screw rotating driving roller (108) and the movable screw rotating driving roller (109) is larger than the maximum diameter of the screw, the screw falls from the space between the fixed screw rotating driving roller (108) and the movable screw rotating driving roller (109) and falls along the qualified product channel (136) and the unqualified product channel (137) respectively;

s16, after the screening of the screws is finished, a piston rod of a driving roller distance adjusting cylinder (113) retracts, and a movable supporting frame (122) moves under the action of a group of return springs (112), so that a movable screw rotating driving roller (109) is attached to the outer wall of a fixed screw rotating driving roller (108);

s17, rotating the turntable (103), and rotating the screw rotating unit (104) at the position of the qualified and unqualified material distributing unit (106) to the position of the screw feeding unit (102);