CN104237248A - Machine vision detection mechanism for standard fasteners - Google Patents
Machine vision detection mechanism for standard fasteners Download PDFInfo
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- CN104237248A CN104237248A CN201410347311.5A CN201410347311A CN104237248A CN 104237248 A CN104237248 A CN 104237248A CN 201410347311 A CN201410347311 A CN 201410347311A CN 104237248 A CN104237248 A CN 104237248A
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Abstract
The invention discloses a machine vision detection mechanism for standard fasteners. A vibrating disk (15) is arranged at one end of the top part of a machine stand (5), an indexing turntable is arranged at the other end of the top part of the machine stand (5), a guide rail (12) for conveying parts is arranged between the vibrating disk (15) and the indexing turntable, the guide rail (12) is composed of a fixed conveying rail (12a) and an adjustable conveying rail (12b), which are arranged side by side, the outlet ends of the fixed conveying rail (12a) and the adjustable conveying rail (12b) are bent upwards to form a horizontal section (12c), and a blowing device (16) is arranged on the side edge of the outlet end of the guide rail (12). The machine vision detection mechanism adopts three CCD cameras to shoot images of the parts in different angles, can be used for automatically completing conveying, detection, sorting and packaging of the standard fasteners, can be used for detecting the various standard fasteners, can be adaptive to the to-be-detected parts with different specifications, and is good in universality, high in automation degree and high in detection efficiency.
Description
Technical field
The invention belongs to pick-up unit technical field, specifically, particularly a kind of standard fasteners Machine Vision Detection mechanism.
Background technology
In recent years, utilizing machine vision technique to carry out in Quality Detection, having done large quantity research abroad, and obtaining many important achievement.Vision-based detection has the advantages such as noncontact, speed is fast, precision is high, antijamming capability is strong, important application prospect is had in modern manufacturing industry, just obtaining applying more and more widely at present in the fields such as machining accuracy detection, workpiece size measurement, Product checking, vision detection technology is solve on-line measurement problem to provide a kind of desirable means.The eighties in 20th century, NBS once did prediction on the basis of investigation: 80% of industrial detection work from now on will be completed by vision detection technology.
Based on standard fasteners, part all has a wide range of applications in many industries of the national economy such as auto industry, machinery manufacturing industry, building industry, electronics industry.Online or the final mass of standard fasteners detects and directly affects the quality of standard fasteners and the control of enterprise cost.For hex bolts, hex bolts is as the most common connection securing member of one, and its manufacturing process is: wire drawing, cold-heading, thread rolling, thermal treatment, zinc-plated or blackout etc.Wire drawing be the diameter control of wire rod steel mill produced by cold-drawn wire drawing to given size, and ensure the smooth of wire surface; Cold-heading is polished rod bolt by mould the wire rod cold-heading molding after wire drawing; Thread rolling is by the screw portion machining screw of automatic flat die thread-rolling machine at polished rod bolt; Thermal treatment eliminates cold working stress by forms such as tempering, ensures intensity and the toughness of bolt; Zinc-plated or blackout is got rusty in order to anti-, strengthens the resistance to corrosion of bolt.Each production link has corresponding detection method, to ensure the correctness of this link.From the angle of quality control, particularly important to the detection of bolt.
For a long time, the detection of hex bolts mainly relies on artificial mode, namely operating personnel measure the physical dimension of bolt every now and then with survey instrument, this manual detection method not only wastes a large amount of time and manpower, and low precision, probability that is undetected, flase drop is also very high, greatly reduces the work efficiency of enterprise and adds the labour cost of enterprise.
Existing indivedual enterprise development goes out vision-based inspection device at present, and wherein, part indexing rotary table is the important component part in this pick-up unit, and part to be checked reaches part indexing rotary table, is divided into certified products and unacceptable product after then being detected by testing agency.Investigate with reality by analysis and find, existing pick-up unit still has following deficiency:
The first, the function that testing agency can detect is less, and accommodation is narrow.Substantially, to detect with or without whether tapping, length enough etc. as thread measurement can only detect, can not double thread pitch, the whether qualified detection of thread form, and accuracy in detection is not high, still has higher faulty materials after detection.
The second, a kind of pick-up unit can only detect a kind of part, and standard fasteners enterprise generally produces various parts, as screw, nut, bolt etc., if all apply automatic detection device, the pick-up unit must buying many covers different detects, and enterprise's Productive statistics increases.
3rd, a kind of standard fasteners part has plurality of specifications, screws as different in nominal diameter, and its size difference is comparatively large, as screws such as M1.4, M4, M8, M10, M12, M20.The detection dish of existing pick-up unit need to part respective production detection dish of each specification, correspondingly when will survey different size part changes detection dish, so just causes the problems such as pick-up unit cost increases, detection efficiency is not high.
4th, existing pick-up unit just detects faulty materials, and detecting qualified part also needs 1-2 name workman to carry out bag distribution packaging, and work efficiency and the labour cost problem of enterprise thoroughly do not solve.
Summary of the invention
Technical matters to be solved by this invention is to provide the standard fasteners Machine Vision Detection mechanism that a kind of versatility is good, detection efficiency is high.
Technical scheme of the present invention is as follows: a kind of standard fasteners Machine Vision Detection mechanism, there is board (5), in the one end at described board (5) top, vibrating disk (15) is installed, the other end at board (5) top arranges indexing rotary table, this indexing rotary table is by upper stepper motor (9) driven rotary of installing of board (5), the guide rail (12) of conveying parts is provided with between described vibrating disk (15) and indexing rotary table, this guide rail (12) entrance point height endpiece low dip is arranged, the entrance point of guide rail (12) connects with the part mouth that goes out on vibrating disk (15), the endpiece of guide rail (12) is near described indexing rotary table, described guide rail (12) is made up of the fixing conveyor track (12a) be arranged side by side and adjustable conveyor track (12b), described fixing conveyor track (12a) is supported on board (5) by the first bracing frame (13), adjustable conveyor track (12b) is supported on board (5) by the second bracing frame (14), the bottom of the second bracing frame (14) is fixed by bolt and board (5), and the hole that the second bracing frame (14) bottom is passed through for bolt is bar hole,
The endpiece of described fixing conveyor track (12a) and adjustable conveyor track (12b) all upwards bends, be formed with horizontal segment (12c), and the side of guide rail (12) endpiece is provided with blowning installation (16), described blowning installation (16) is connected to the gas blow pipe that part can be blowed to indexing rotary table from guide rail (12);
A CCD camera (6) is provided with above described indexing rotary table edge, the camera lens of the one CCD camera (6) down, 2nd CCD camera (7) and the 3rd CCD camera (8) are set on the side of indexing rotary table, described 2nd CCD camera (7) is near the 3rd CCD camera (8), and the camera lens of the 2nd CCD camera (7) and the 3rd CCD camera (8) is all towards indexing rotary table;
The slideway (10) for accepting part is also provided with on the side of described indexing rotary table, this slideway (10) and the separation of the 2nd CCD camera (7) are in the both sides of indexing rotary table, described slideway (10) entrance point height endpiece low dip is arranged, and be fixedly mounted on board (5), the disengaging yoke (11) for part being allocated to described slideway (10) is provided with on the side of slideway (10) entrance point, this disengaging yoke (11) is positioned at the top of indexing rotary table, one end of disengaging yoke (11) is fixed on board (5) by bearing, the other end of disengaging yoke (11) is obliquely extended to the top at indexing rotary table edge.
Adopt above technical scheme, board, as workbench, is convenient to the parts such as the indexing rotary table of pick-up unit, disengaging yoke and is arranged.Vibrating disk is used for splendid attire standard fasteners to be checked, during vibrating disk work, under itself vibrates effect, makes standard fasteners pass through part mouth singly and enters guide rail.Guide rail on board is used for standard fasteners to be checked conveying, and guide rail is obliquely installed, and is conducive to standard fasteners to be checked from the slippage of trend indexing rotary table; Guide rail is made up of the fixing conveyor track be arranged side by side and adjustable conveyor track, and be supported on board by bracing frame, structure is simple on the one hand, be easy to processing and fabricating, it is firm that guide rail is installed on board, on the other hand, adjustable conveyor track can be moved by the bolt unclamped bottom the second bracing frame, to change the distance between adjustable conveyor track and fixing conveyor track, thus the needs that adaptation different batches part dimension to be checked differs, regulate not only convenient but also quick.The endpiece of guide rail is provided with horizontal segment, standard fasteners to be checked is waited at this, when indexing rotary table rotate in place, blown to a standard fasteners to be checked near indexing rotary table by gas blow pipe by blowning installation, make this standard fasteners to be checked enter indexing rotary table location.
In the process of indexing rotary table by the stepper motor driven rotary that board is installed, the standard fasteners to be checked of locating on it is along the circumferential direction carried, standard fasteners to be checked detects station by vision sensor successively, part picture is taken by three CCD cameras, because these three CCD cameras are arranged in the different azimuth of indexing rotary table, thus can treat zero-detection part to take pictures from different perspectives, thus formed comprehensively, accurately, part picture clearly, then these part pictures are sent to vision-based detection recognition software system to carry out analysis and judge that whether part is qualified, when part rotates to separation station, disengaging yoke plays a part to stop and guide elements, part is separated with indexing rotary table, and part is allocated to slideway from indexing rotary table, because slideway is in tilted layout, enter the part of slideway from its endpiece direction landing of trend, the sorting shutter of ways-end is according to the differentiation result of vision-based detection recognition software system, part is divided into certified products and faulty materials, faulty materials fall in faulty materials case, certified products enter part subpackage mechanism, according to the quantity per unit pack specification set in advance, automatically certified products are packaged, then splitting enters in certified products case.The above course of work is not only simple but also quick, and not only automaticity is high, and effectively improves detection efficiency.
Described indexing rotary table is made up of Moving plate (1) and price fixing (2), the disc structure that Moving plate (1) and price fixing (2) are equal diameters, Moving plate (1) is positioned at directly over price fixing (2), both fit fixing, circumferentially equally distributed first breach (1a) is had in the edge of described Moving plate (1), the first lug (1b) is formed between two adjacent first breach (1a), the edge of price fixing (2) has circumferentially equally distributed second breach (2a), the second lug (2b) is formed between two adjacent second breach (2a), described second breach (2a) and the first breach (1a) one_to_one corresponding, and the second breach (2a) and the first breach (1a) partly overlap, form bayonet socket (3), cushion block (4) is provided with at the top of every block second lug (2b), this cushion block (4) is circumferentially uniformly distributed, described cushion block (4) is arranged in the first breach (1a), and the bayonet socket of adjacent correspondence (3), the end face of cushion block (4) and the either flush of the first lug (1b).
Moving plate and the price fixing moulding of above structure composition indexing rotary table are simple, and processing and fabricating is easy, and cost is low; And Moving plate is combined closely with price fixing, it is firm to connect, and synchronism and the stationarity of running under stepper motor drives are good.The first breach on Moving plate is overlapping with the second barbed portion on price fixing, form bayonet socket, this bayonet socket can be used for locating various standard fasteners, as screw, nut, bolt etc., versatility is good, enterprise adopts a set of pick-up unit can detect various standard fasteners, greatly reduces the equipment investment of enterprise thus.When localization criteria securing member, cushion block and Moving plate first lug common support standard fasteners, due to the end face of cushion block and the either flush of Moving plate first lug, can guarantee that standard fasteners is positioned in corresponding bayonet socket reposefully like this, effectively prevent generation that is crooked or obscission.
In order to simplify structure, be convenient to processing and fabricating, described disengaging yoke (11) is bar shaped block structure.
Can snap in smoothly in the bayonet socket of correspondence in order to ensure part to be checked, and reliably locate in bayonet socket, described bayonet socket (3) from outside to inside width reduces gradually.
In order to ensure the structural strength of Moving plate, the integral middle of described Moving plate (1) end face is formed with up-small and down-big step-like boss.
In order to ensure the structural strength of price fixing, the integral middle of described price fixing (2) bottom surface is formed with up big and down small frustum.
Between described Moving plate (1) with price fixing (2) by two circumferentially equally distributed fastening bolt be connected, the upper hole supplying fastening bolt to pass of Moving plate (1) is circular arc cylindrical void (1c), and the center of circle of this cylindrical void (1c) is on the axial line of Moving plate (1).Be connected firmly between above structure Moving plate and price fixing, reliably, dismounting is not only simple but also convenient.Because the hole that Moving plate passes for fastening bolt is circular arc cylindrical void, in time unclamping fastening bolt, Moving plate can be rotated, to change the size of each bayonet socket, thus adapt to the piece test of various outer diameter size, without the need to changing indexing rotary table during such detection different size part, while saving production cost, substantially increase detection efficiency.
In order to simplify structure, being convenient to processing and fabricating, guaranteeing the fixing be connected between cushion block with price fixing, described cushion block (4) is pane, and is fixed by welding and price fixing (2).
Beneficial effect: the present invention takes part picture from different perspectives by three CCD cameras, automatically the conveying of standard fasteners, detection, sorting and packaging can be completed, can be used for detecting various standard fasteners, and the part to be checked of different size can be adapted to, not only versatility is good, automaticity is high, and detection efficiency is high.
Accompanying drawing explanation
Fig. 1 is vertical view of the present invention.
Fig. 2 is front view of the present invention.
Fig. 3 is the structural representation of guide rail.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the stereographic map of indexing rotary table.
Fig. 6 is the front view of indexing rotary table.
Fig. 7 is the structural representation of Moving plate.
Fig. 8 is the structural representation of price fixing.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 6, Fig. 7 and Fig. 8, install vibrating disk 15 in the one end at board 5 top, this vibrating disk 15 is by driven by vibrating motors.The other end at board 5 top arranges indexing rotary table, and indexing rotary table is arranged on board 5, is made up of Moving plate 1 and price fixing 2.Moving plate 1 and price fixing 2 are the disc structure of equal diameters, and Moving plate 1 is positioned at directly over price fixing 2.The integral middle of described Moving plate 1 end face is formed with up-small and down-big step-like boss, the integral middle of price fixing 2 bottom surface is formed with up big and down small frustum, the bottom surface of Moving plate 1 and the end face of price fixing 2 fit, between Moving plate 1 with price fixing 2 by two circumferentially equally distributed fastening bolt be connected, the hole that Moving plate 1 passes for fastening bolt is circular arc cylindrical void 1c, and the center of circle of this cylindrical void 1c is on the axial line of Moving plate 1.Be provided with stepper motor 9 in the below of described price fixing 2, this stepper motor 9 is installed on the top of board 5.The output shaft of stepper motor 9 straight up, and is connected with the center of price fixing 2 and Moving plate 1, when stepper motor 9 operates time, whole indexing rotary table can be driven to rotate together.
As shown in Fig. 5, Fig. 7, Fig. 8, have circumferentially equally distributed first breach 1a in the edge of Moving plate 1, the number of the first breach 1a is determined according to actual needs, forms the first lug 1b between two adjacent first breach 1a.Circumferentially equally distributed second breach 2a is had in the edge of price fixing 2, the second lug 2b is formed between two adjacent second breach 2a, described second breach 2a and the first breach 1a one_to_one corresponding, and the second breach 2a and the first breach 1a partly overlaps, form bayonet socket 3, this bayonet socket 3 from outside to inside width reduces gradually.Be provided with cushion block 4 at the top of every block second lug 2b, this cushion block 4 is pane, and cushion block 4 is circumferentially uniformly distributed, and is fixed by welding and price fixing 2.Each cushion block 4 is arranged in the first breach 1a, and the bayonet socket 3 of adjacent correspondence, the end face of cushion block 4 and the either flush of the first lug 1b.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the guide rail 12 of conveying parts is provided with between vibrating disk 15 and indexing rotary table, this guide rail 12 entrance point height endpiece low dip is arranged, and the entrance point of guide rail 12 connects with the part mouth that goes out on vibrating disk 15, and the endpiece of guide rail 12 is near described indexing rotary table.Guide rail 12 is made up of the fixing conveyor track 12a be arranged side by side and adjustable conveyor track 12b, fixes and forms rail groove between conveyor track 12a and adjustable conveyor track 12b, and the endpiece of fixing conveyor track 12a and adjustable conveyor track 12b all upwards bends, and is formed with horizontal segment 12c.Described fixing conveyor track 12a is supported on board 5 by two the first bracing frames 13, adjustable conveyor track 12b is supported on board 5 by two the second bracing frames 14, the bottom of the second bracing frame 14 is fixed by bolt and board 5, and the hole passed through for bolt bottom the second bracing frame 14 is bar hole.When unclamping the bolt bottom the second bracing frame 14, the distance between adjustable adjustable conveyor track 12b and fixing conveyor track 12a, to change the width of guide rail 12 mid-rail groove, regulates after putting in place, retorque.Be provided with blowning installation 16 at the side of described guide rail 12 endpiece, blowning installation 16 is connected to gas blow pipe, part can be blowed to indexing rotary table from guide rail 12 by this gas blow pipe.
As shown in Figure 1 and Figure 2, above indexing rotary table edge, the camera lens of CCD camera the 6, an one CCD camera 6 is provided with down.2nd CCD camera 7 and the 3rd CCD camera 8 are set on the side of indexing rotary table, described 2nd CCD camera 7 is near the 3rd CCD camera 8, there is between 2nd CCD camera 7 and the 3rd CCD camera 8 angle of about 30 °, and the camera lens of the 2nd CCD camera 7 and the 3rd CCD camera 8 is all towards indexing rotary table.An above CCD camera 6, the 2nd CCD camera 7 and the 3rd CCD camera 8 are supported on board 5 each via the support of correspondence.
As shown in Figure 1, the slideway 10 for accepting part is also provided with on the side of indexing rotary table, this slideway 10 and the 2nd CCD camera 7 are lived apart in the both sides of indexing rotary table, described slideway 10 entrance point height endpiece low dip is arranged, and be fixedly mounted on board 5, be provided with the disengaging yoke 11 for part being allocated to described slideway 10 on the side of slideway 10 entrance point, this disengaging yoke 11 is positioned at the top of indexing rotary table, and is preferably bar shaped block structure.One end of disengaging yoke 11 is fixed on board 5 by bearing, and the other end of disengaging yoke 11 is obliquely extended to the top at indexing rotary table edge.
Claims (8)
1. a standard fasteners Machine Vision Detection mechanism, there is board (5), it is characterized in that: in the one end at described board (5) top, vibrating disk (15) is installed, the other end at board (5) top arranges indexing rotary table, this indexing rotary table is by upper stepper motor (9) driven rotary of installing of board (5), the guide rail (12) of conveying parts is provided with between described vibrating disk (15) and indexing rotary table, this guide rail (12) entrance point height endpiece low dip is arranged, the entrance point of guide rail (12) connects with the part mouth that goes out on vibrating disk (15), the endpiece of guide rail (12) is near described indexing rotary table, described guide rail (12) is made up of the fixing conveyor track (12a) be arranged side by side and adjustable conveyor track (12b), described fixing conveyor track (12a) is supported on board (5) by the first bracing frame (13), adjustable conveyor track (12b) is supported on board (5) by the second bracing frame (14), the bottom of the second bracing frame (14) is fixed by bolt and board (5), and the hole that the second bracing frame (14) bottom is passed through for bolt is bar hole,
The endpiece of described fixing conveyor track (12a) and adjustable conveyor track (12b) all upwards bends, be formed with horizontal segment (12c), and the side of guide rail (12) endpiece is provided with blowning installation (16), described blowning installation (16) is connected to the gas blow pipe that part can be blowed to indexing rotary table from guide rail (12);
A CCD camera (6) is provided with above described indexing rotary table edge, the camera lens of the one CCD camera (6) down, 2nd CCD camera (7) and the 3rd CCD camera (8) are set on the side of indexing rotary table, described 2nd CCD camera (7) is near the 3rd CCD camera (8), and the camera lens of the 2nd CCD camera (7) and the 3rd CCD camera (8) is all towards indexing rotary table;
The slideway (10) for accepting part is also provided with on the side of described indexing rotary table, this slideway (10) and the separation of the 2nd CCD camera (7) are in the both sides of indexing rotary table, described slideway (10) entrance point height endpiece low dip is arranged, and be fixedly mounted on board (5), the disengaging yoke (11) for part being allocated to described slideway (10) is provided with on the side of slideway (10) entrance point, this disengaging yoke (11) is positioned at the top of indexing rotary table, one end of disengaging yoke (11) is fixed on board (5) by bearing, the other end of disengaging yoke (11) is obliquely extended to the top at indexing rotary table edge.
2. standard fasteners Machine Vision Detection mechanism according to claim 1, it is characterized in that: described indexing rotary table is made up of Moving plate (1) and price fixing (2), the disc structure that Moving plate (1) and price fixing (2) are equal diameters, Moving plate (1) is positioned at directly over price fixing (2), both fit fixing, circumferentially equally distributed first breach (1a) is had in the edge of described Moving plate (1), the first lug (1b) is formed between two adjacent first breach (1a), the edge of price fixing (2) has circumferentially equally distributed second breach (2a), the second lug (2b) is formed between two adjacent second breach (2a), described second breach (2a) and the first breach (1a) one_to_one corresponding, and the second breach (2a) and the first breach (1a) partly overlap, form bayonet socket (3), cushion block (4) is provided with at the top of every block second lug (2b), this cushion block (4) is circumferentially uniformly distributed, described cushion block (4) is arranged in the first breach (1a), and the bayonet socket of adjacent correspondence (3), the end face of cushion block (4) and the either flush of the first lug (1b).
3. standard fasteners Machine Vision Detection mechanism according to claim 1, is characterized in that: described disengaging yoke (11) is bar shaped block structure.
4. standard fasteners Machine Vision Detection mechanism according to claim 2, is characterized in that: described bayonet socket (3) from outside to inside width reduces gradually.
5. the standard fasteners Machine Vision Detection mechanism according to claim 2 or 4, is characterized in that: the integral middle of described Moving plate (1) end face is formed with up-small and down-big step-like boss.
6. standard fasteners Machine Vision Detection mechanism according to claim 5, is characterized in that: the integral middle of described price fixing (2) bottom surface is formed with up big and down small frustum.
7. standard fasteners Machine Vision Detection mechanism according to claim 2, it is characterized in that: between described Moving plate (1) with price fixing (2) by two circumferentially equally distributed fastening bolt be connected, the upper hole supplying fastening bolt to pass of Moving plate (1) is circular arc cylindrical void (1c), and the center of circle of this cylindrical void (1c) is on the axial line of Moving plate (1).
8. standard fasteners Machine Vision Detection mechanism according to claim 2, is characterized in that: described cushion block (4) is pane, and is fixed by welding and price fixing (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410347311.5A CN104237248A (en) | 2014-07-21 | 2014-07-21 | Machine vision detection mechanism for standard fasteners |
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| CN201410347311.5A CN104237248A (en) | 2014-07-21 | 2014-07-21 | Machine vision detection mechanism for standard fasteners |
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| CN106705843A (en) * | 2016-12-30 | 2017-05-24 | 芜湖哈特机器人产业技术研究院有限公司 | Bolt sorting system and sorting method thereof |
| CN106862104A (en) * | 2017-03-30 | 2017-06-20 | 江苏理工学院 | Auto parts clear size of opening automatic detection device |
| CN106944356A (en) * | 2017-03-30 | 2017-07-14 | 江苏理工学院 | The station automatic detection device of auto parts and components eight |
| CN107024477A (en) * | 2017-03-30 | 2017-08-08 | 江苏理工学院 | The station automatic detection device of motor internal magnetic shoe six |
| CN107782249A (en) * | 2016-08-24 | 2018-03-09 | 苏州鸿益进五金有限公司 | Screwed hole depth detection equipment |
| CN114018936A (en) * | 2021-11-05 | 2022-02-08 | 重庆建设工业(集团)有限责任公司 | Visual detection device and method for workpiece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20141224 |