CN115574749B - Device and method for rapidly screening external thread size of fastener - Google Patents
Device and method for rapidly screening external thread size of fastener Download PDFInfo
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- CN115574749B CN115574749B CN202211318991.9A CN202211318991A CN115574749B CN 115574749 B CN115574749 B CN 115574749B CN 202211318991 A CN202211318991 A CN 202211318991A CN 115574749 B CN115574749 B CN 115574749B
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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Abstract
The invention relates to the technical field of thread size detection, and discloses a device and a method for rapidly screening the external thread size of a fastener, wherein the screening device comprises the following components: fixed establishment, detection mechanism includes: the first housing is fixed on the push rod head of the first miniature electric push rod; a plurality of detecting element are the matrix setting on first casing, and every detecting element all includes: the first backup pad, the second casing, be equipped with in the second casing: the first pressure sensor, the spring, its upper end has pressing plates; the limiting plate, the test needle, the vertical setting, the lower extreme stretches out the second body; the screening device and the screening method can be used for rapidly detecting unqualified fasteners, time and labor are saved, and measuring accuracy is improved.
Description
Technical Field
The invention relates to the technical field of thread size detection, in particular to a device and a method for rapidly screening the external thread size of a fastener.
Background
With the development of society, the shopping mode of people changes, and online shopping becomes the main mode of shopping, and in order to be convenient for transport, a plurality of large-scale articles such as shelves, cabinets, chairs and the like are changed from original integrated design into detachable design, transport after the dismantlement, use the fastener to install after reaching, therefore the fastener must ensure qualified, can make up the installation and not loosen, reach the quality requirement.
The existing fasteners are required to be inspected before delivery, unqualified fasteners are screened out, however, the existing inspection device is used for manually inspecting the sizes of external threads of the fasteners by using a vernier caliper or a micrometer, the efficiency is low, only spot inspection can be performed, and some unqualified fasteners still exist outside delivery, so that the problem that articles cannot be fastened and installed due to unqualified fasteners is avoided, therefore, some fasteners are generally generated when the manufacturer delivers the products for later use, and the cost and the waste are increased.
Because the existing inspection thread size is manually inspected by using a vernier caliper or a micrometer, the existing inspection thread size has hysteresis, can not be timely subjected to production and manufacturing intervention, is time-consuming and labor-consuming, has larger human measurement error, and can not meet the requirement of automatic production.
Disclosure of Invention
The invention provides a device and a method for rapidly screening the external thread size of a fastener, which can rapidly detect unqualified fasteners, save time and labor and improve the accuracy of measurement.
The invention provides a device and a method for rapidly screening the external thread size of a fastener, comprising the following steps:
the fixing mechanism is used for fixing the two sides and the bottom of the top of the screw rod with the fastener horizontally placed;
detection mechanism for detect the external screw thread at screw rod top, detection mechanism includes:
a bracket disposed around the fastener;
the first miniature electric push rod is arranged on the bracket, and the push rod head is arranged downwards;
the first shell is fixedly connected with the push rod head of the first miniature electric push rod;
a plurality of detecting element are the matrix setting on first casing, and every detecting element all includes:
a first support plate disposed within the first housing;
the second casing, the upper end is fixed with the bottom of first backup pad, be equipped with in the second casing:
the first pressure sensor is fixed at the top of the second shell;
the upper end of the spring is connected with a pressing plate, and the pressing plate is positioned right below the first pressure sensor;
the top of the limiting plate is fixedly connected with the lower end of the spring;
the upper end of the test needle is fixedly connected with the bottom of the limiting plate, and the lower end of the test needle sequentially extends out of the second shell and the first shell;
the device also comprises a plurality of alarms, and the opposite screw is arranged on the first shell;
the controller is arranged in the first shell, and the first miniature electric push rod, the plurality of first pressure sensors and the plurality of alarms are respectively connected with the controller through electric signals.
Further, the first casing is internally provided with a plurality of sliding rods which are parallel to each other and have the same interval, a plurality of sliding sleeves are sleeved on the sliding rods, the first supporting plates are fixed on the bottom surfaces of the sliding sleeves, the left sides and the right sides of the plurality of second casings are respectively provided with a first electromagnet, and the first electromagnets are connected with the electric signals of the controller.
Further, still be equipped with the second electro-magnet in the first casing, the second electro-magnet is located the direct top of a plurality of sliding sleeves, the sliding sleeve appearance is square structure, the top of a plurality of sliding sleeves all is equipped with the third electro-magnet, the left and right sides of a plurality of sliding sleeves all is equipped with the fourth electro-magnet, second electro-magnet, third electro-magnet and fourth electro-magnet are connected with the controller electrical signal respectively.
Further, a conveying device is included, the conveying device includes:
a driving motor;
four gears arranged in two gear boxes, two gear boxes arranged at two ends of the fastener conveying path, two gears arranged in each gear box, two gears arranged up and down and meshed with each other, a rotating shaft of one gear in the four gears is fixed on an output shaft of a driving motor,
the four belt wheels are sleeved on the rotating shafts of the four gears in a one-to-one correspondence manner;
two conveying belts, one of which is sleeved on two belt wheels on the rotating shafts of the two gears at the upper parts of the two gear boxes, and the other of which is sleeved on two belt wheels on the rotating shafts of the two gears at the lower parts of the two gear boxes, and is used for clamping a screw rod for conveying one end of a fastening piece close to the bolt head;
the driving motor is in electrical signal connection with the controller.
Further, the fixing mechanism includes: the first mounting and second mounting, first mounting and second mounting set up in the opposite both sides of screw rod, first mounting includes:
a first support base;
the second miniature electric push rod is fixed on the first supporting seat;
the bottom of the second supporting plate is fixedly connected with a push rod head of the second miniature electric push rod;
a second pressure sensor disposed on a top surface of the second support plate;
the second fixing member includes:
the two third support plates are respectively arranged on the left side and the right side of the first shell through connecting rods;
the third pressure sensors are arranged on the bottom surfaces of the two third support plates;
the second miniature electric push rod, the second pressure sensor and the third pressure sensor are respectively connected with the controller through electric signals.
Further, be equipped with a plurality of first constant head tanks in the second backup pad, be equipped with a plurality of second constant head tanks in the third backup pad, first constant head tank and second constant head tank symmetry relatively set up, the position of first constant head tank and the position of second constant head tank all cooperate with the position of slide bar for it is fixed to carry out the centre gripping to the screw rod.
Further, a plurality of step limiting blocks are arranged in the first positioning groove and the second positioning groove, and the second pressure sensor and the third pressure sensor are respectively arranged on the step limiting blocks.
Further, the method further comprises the following steps: sorting mechanism for sort the unqualified fastener of external screw thread size detection, sorting mechanism includes:
the second supporting seat is positioned at the left side of the bolt head;
the steering engine is arranged on the second supporting seat;
the third miniature electric push rod is arranged on a rudder disc of the steering engine;
the sleeve joint is fixed on the push rod head of the third miniature electric push rod, and the right end of the sleeve joint is provided with an opening;
the fifth electromagnet is arranged at the bottom in the socket joint;
and the steering engine and the fifth electromagnet are respectively connected with the controller through signals.
A quick screening method for the external thread size of a fastener comprises the following steps:
s1, fixing two sides and the bottom of the top of a screw rod horizontally placed by a fastener through a fixing mechanism;
s2, the controller controls the first miniature electric push rod to extend for a set distance, and the first shell is pushed to the top of the screw rod;
s3, tightly abutting the crests and the bottoms of the external threads at the top of the screw rod through the test needle, compressing the spring at the moment, enabling the first pressure sensor to bear the pressure of the pressing plate, and sending the pressure to the controller;
s4, after receiving the pressure value of the first pressure sensor, the controller calculates the pressure difference, compares the pressure value and the pressure difference with the set pressure value and the set pressure difference range, and controls the alarm to alarm when the pressure value or the pressure difference range is not in the set range;
s5, determining the position of an unqualified fastener according to the position of the alarm;
s6, removing unqualified fasteners.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the two sides and the bottom of the top of the screw rod of the fastener are fixed through the fixing mechanism, and the controller is used for controlling the first miniature electric push rod to extend for a set distance so as to push the first shell to the top of the screw rod; the spring is compressed at the moment through the crest and the root of the external thread of the test needle tightly abutted against the top of the screw, and the first pressure sensor receives the pressure of the pressing plate and sends the pressure to the controller; after the controller receives the pressure values of the first pressure sensors, the pressure difference between the two adjacent first pressure sensors is calculated, the pressure values detected by the plurality of first pressure sensors and the pressure difference between the two adjacent first pressure sensors are compared with the set pressure values and the range of the pressure difference, and when the pressure values or the range of the pressure difference are not in the set range, the controller controls the alarm to alarm.
Drawings
Fig. 1 is a schematic longitudinal sectional view of a device for rapidly screening the external thread size of a fastener according to the present invention.
Fig. 2 is a schematic structural diagram of a detection unit in a device for rapidly screening the external thread size of a fastener.
Fig. 3 is a schematic bottom view of a detection mechanism in a device for rapidly screening the external thread size of a fastener.
Fig. 4 is a schematic top view of a second support plate in the device for quickly screening the external thread size of a fastener according to the present invention.
Fig. 5 is a schematic structural view of a sliding sleeve in a device for rapidly screening the external thread size of a fastener.
Fig. 6 is a schematic structural view of a sorting mechanism in a device for rapidly screening the external thread size of a fastener.
Reference numerals illustrate:
the device comprises a first supporting seat, a second miniature electric push rod, a 3-second supporting plate, a 4-screw rod, a 5-bracket, a 6-third supporting plate, a 7-connecting rod, an 8-first miniature electric push rod, a 9-sliding sleeve, a 10-bolt head, an 11-locating pin, a 12-conveying belt, a 13-sliding rod, a 14-first electromagnet, a 15-first shell, a 16-second electromagnet, a 17-contact, a 18-, a 19-first locating groove, a 20-second locating groove, a 21-test needle, a 22-limiting plate, a 23-sliding block, a 24-second shell, a 25-spring, a 26-first pressure sensor, a 27-first supporting plate, a 28-sliding sleeve, a 28-1-third electromagnet, a 28-2-fourth electromagnet, a 29-second supporting seat, a 30-steering engine, a 31-third miniature electric push rod, a 32-sleeve joint and a 33-fifth electromagnet.
Detailed Description
One embodiment of the present invention will be described in detail below with reference to fig. 1-6, but it should be understood that the scope of the present invention is not limited by the embodiment.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
As shown in fig. 1, the device and the method for quickly screening the external thread size of the fastener provided by the embodiment of the invention comprise the following steps: the fixing mechanism is used for fixing the two sides and the bottom of the top of the screw 4 horizontally placed by the fastening piece;
detection mechanism for detect the external screw thread at screw rod 4 top, detection mechanism includes:
a bracket 5 provided around the fastener;
the first miniature electric push rod 8 is arranged on the bracket 5, and the push rod head is arranged downwards;
the first shell 15 is fixedly connected with the push rod head of the first miniature electric push rod 8;
a plurality of detecting units are arranged on the first housing 15 in a matrix, each detecting unit including:
a first support plate 27 provided in the first housing 15;
the second casing 24, the upper end is fixed with the bottom of first backup pad 27, be equipped with in the second casing 24:
a first pressure sensor 26 fixed to the top of the second housing 24;
a spring 25, the upper end of which is connected with a pressing plate, the pressing plate being located right below the first pressure sensor 26;
the top of the limiting plate 22 is fixedly connected with the lower end of the spring 25;
the test needle 21 is vertically arranged, the upper end of the test needle is fixedly connected with the bottom of the limiting plate 22, and the lower end of the test needle sequentially extends out of the second shell 24 and the first shell 15;
the device also comprises a plurality of alarms, and the opposite screw 4 is arranged on the first shell 15;
the controller is arranged in the first shell 15, and the first miniature electric push rod 8, the plurality of first pressure sensors 26 and the plurality of alarms are respectively connected with the controller through electric signals.
The plurality of detection units are arranged on the first shell 15 in a matrix manner, so that the sizes of external threads of a plurality of fasteners can be detected simultaneously, and the detection efficiency is improved. Can set up the multirow, can test a plurality of screws simultaneously, for example two rows or three rows, can test the screw thread size of two or three screws simultaneously, the position between the adjacent two rows of detecting element can be adjusted, adapts to the screw rod of different models.
The fixing mechanism is arranged on the support 5, and is a fixing limiting block with a telescopic function, so that the screw rod is kept motionless through the fixing limiting block, and the screw rod is kept motionless in the detection process conveniently.
Detection principle: according to the invention, the two sides and the bottom of the top of the screw are fixed through the fixing mechanism, and the controller is used for controlling the first miniature electric push rod 8 to extend for a set distance so as to push the first shell 15 to the top of the screw 4; the set distance is set according to the type of the screw rod, the screw rod is thinner, the extension distance is longer, the screw rod is thicker, the extension distance is shorter, the test needle 21 is tightly abutted against the crests and the bottoms of the external threads at the top of the screw rod 4, at the moment, the spring 25 is compressed, the first pressure sensor 26 receives the pressure of the pressing plate, and the detected pressure is sent to the controller; after the controller receives the pressures detected by the plurality of first pressure sensors 26, the pressure difference between the two adjacent first pressure sensors 26 is calculated, the pressure values detected by the plurality of first pressure sensors 26 and the pressure difference between the two adjacent first pressure sensors 26 are compared with the set pressure values and the set pressure difference ranges, when the pressure values or the pressure difference ranges are not in the set ranges, the controller controls the alarm to give an alarm, the alarm is a buzzer and an indicator lamp, each fastener is correspondingly provided with an indicator lamp, the indicator lamp is changed into red to be unqualified for detection, the indicator lamp is changed into green to be qualified for detection, and after detection, a worker determines the fasteners to be removed according to the colors of the buzzer and the indicator lamp.
In order to adjust the distance between two adjacent test needles 21 and adapt to fasteners with screw tooth intervals of different specifications, further, a plurality of slide bars 13 which are parallel to each other and have the same interval are horizontally arranged in the first shell 15, a plurality of sliding sleeves 28 are sleeved on the slide bars 13, the first support plates 27 are fixed on the bottom surfaces of the sliding sleeves 28, first electromagnets 14 are arranged on the left side and the right side of the plurality of second shells 24, and the first electromagnets 14 are in electric signal connection with a controller.
The left side and the right side of each sliding sleeve 28 on the sliding rod 13 are respectively provided with a limiting protrusion for limiting the moving range of the sliding sleeve 28.
The second housing 24 is a cuboid or a cube, and the first electromagnet 14 is fixed on two opposite sides of the adjacent cuboid or cube.
The sliding rod 13, the sliding sleeve 28 and the first supporting plate 27 are all made of stainless steel.
According to the invention, the controller controls the first electromagnets 14 on the left and right opposite surfaces of the two adjacent second shells 24 to be supplied with current to realize the same magnetic poles, repulsive force is generated, the sliding sleeve 28 is driven to slide on the sliding rod 13 under the action of the repulsive force, the distance between the two adjacent second shells 24 is increased, when the controller controls the first electromagnets on the opposite surfaces of the two adjacent second shells 24 to be supplied with current to realize the same magnetic poles, attractive force is generated, the sliding sleeve 28 is driven to slide on the sliding rod 13 under the action of the attractive force, the distance between the two adjacent second shells 24 is reduced, the distance between the left and right adjacent detection units is adjusted according to the external thread tooth distance of fasteners with different specifications through the controller, and the invention is suitable for fasteners with different specifications.
In order to reduce the sliding friction force of the sliding sleeve 28, as shown in fig. 3 and 5, the sliding sleeve 28 slides freely, further, a second electromagnet 16 is further disposed in the first housing 15, the second electromagnet 16 is located right above the sliding sleeves 28, the sliding sleeve 28 has a square structure, the top of the first supporting plate 27 and the top of the sliding sleeve 28 are fixedly provided with a third electromagnet 28-1, the left side and the right side of the sliding sleeve 28 are respectively provided with a fourth electromagnet 28-2, and the second electromagnet 16, the third electromagnet 28-1 and the fourth electromagnet 28-2 are respectively connected with a controller through electrical signals.
According to the invention, the second electromagnet 16 is arranged in the first shell 15, the third electromagnets are arranged at the top of the sliding sleeve 28 and the top of the first supporting plate 27, the currents of the second electromagnet 16 and the third electromagnet 28-1 are controlled by the controller, so that attractive force is generated between the second electromagnet 16 and the third electromagnet 28-1, the sliding sleeve 28 can overcome the gravity of the second shell and internal parts under the action of the attractive force, the sliding sleeve 28 is not contacted with the sliding rod 13 and is in a magnetic suspension state, friction between the sliding sleeve 28 and the sliding rod 13 in the moving process is avoided, meanwhile, the sliding sleeve 28 can easily slide on the sliding rod 13 to adjust the interval between two adjacent detection units by arranging the fourth electromagnets 28-2 at the left side and the right side of the sliding sleeve 28 and controlling the currents of the fourth electromagnets 28-2 by the controller.
In order to accommodate automated inspection, automated delivery of fasteners is required, further comprising a delivery device comprising: a driving motor;
four gears arranged in two gear boxes, two gear boxes arranged at two ends of the fastener conveying path, two gears arranged in each gear box, two gears arranged up and down and meshed with each other, a rotating shaft of one gear in the four gears is fixed on an output shaft of a driving motor,
the four belt wheels are sleeved on the rotating shafts of the four gears in a one-to-one correspondence manner;
two conveying belts 12, one of which is sleeved on two belt wheels on the rotating shafts of the two gears at the upper parts of the two gear boxes, and the other of which is sleeved on two belt wheels on the rotating shafts of the two gears at the lower parts of the two gear boxes, and is used for clamping a screw 4 for conveying one end of a fastener close to the bolt head 10;
the driving motor is in electrical signal connection with the controller.
According to the invention, the controller controls the driving motor to drive the two gears to move in opposite directions, so that the two conveying belts 12 on the four belt wheels 12-1 clamp and convey the screw 4, and the fastener is automatically conveyed, thereby meeting the requirement of automatic production detection.
Further, the fixing mechanism includes: first mounting and second mounting, first mounting and second mounting set up in screw rod 4 opposite both sides, first mounting includes: a first support base 1; the second miniature electric push rod 2 is fixed on the first supporting seat 1; the bottom of the second supporting plate 3 is fixedly connected with the push rod head of the second miniature electric push rod 2; a second pressure sensor provided on the top surface of the second support plate 3; the second fixing member includes: two third support plates 6 disposed on the left and right sides of the first housing 15 through connection rods 7, respectively; a third pressure sensor provided on the bottom surfaces of the two third support plates 6; the second miniature electric push rod 2, the second pressure sensor and the third pressure sensor are respectively connected with the controller through electric signals.
The two third support plates 6 are used for fixing screws located on the left and right sides of the first housing 15.
According to the invention, the second miniature electric push rod 2 can be used for adjusting the height of the second supporting plate 3 according to the thickness of the screw 4, and the first fixing piece and the second fixing piece can be used for stably fixing the screw 4 through the second pressure sensor and the third pressure sensor, so that the problem of inaccurate detection caused by screw movement in the detection process is avoided.
In order to better position the screw 4, as shown in fig. 3, further, the second support plate 3 is provided with a plurality of first positioning grooves 19, the third support plate 6 is provided with a plurality of second positioning grooves 20, the first positioning grooves 19 and the second positioning grooves 20 are symmetrically arranged relatively, and the positions of the first positioning grooves 19 and the second positioning grooves 20 are matched with the positions of the slide bars 13 for clamping and fixing the screw 4.
According to the invention, the screw 4 is limited and fixed through the first positioning groove 19 and the second positioning groove 20, so that the problem of inaccurate detection caused by sliding of the screw in the process of abutting the test needle is avoided.
In order to position the screws with different types, as shown in fig. 4, further, a plurality of step limiting blocks are respectively disposed in the first positioning groove 19 and the second positioning groove 20, and the second pressure sensor and the third pressure sensor are respectively disposed on the plurality of step limiting blocks.
According to the invention, the plurality of step limiting blocks are arranged in the first positioning groove 19 and the second positioning groove 20, so that the fasteners with different specifications can be stably limited and fixed.
To automatically reject the failed fastener, further, as shown in fig. 6, the method further includes: sorting mechanism for sort the unqualified fastener of external screw thread size detection, sorting mechanism includes: a second support seat 29 located at the left side of the bolt head 10; the steering engine 30 is arranged on the second supporting seat 29; the third miniature electric push rod 31 is arranged on a rudder disc of the steering engine 30; the sleeve joint 32 is fixed on the push rod head of the third miniature electric push rod 31, and the right end of the sleeve joint 32 is opened; a fifth electromagnet 33 disposed at the bottom of the socket 32; the steering engine 30 and the fifth electromagnet 33 are respectively connected with a controller through signals.
When the alarm alarms, the controller controls the third miniature electric push rod 31 to extend, the sleeve joint 32 is used for sleeving the bolt head 10, the controller controls the current of the fifth electromagnet 34 to adsorb the bolt head, the fastener is pulled out of the conveyor belt, then the controller controls the steering engine 30 to rotate a certain angle to drive the unqualified fastener to rotate a certain angle, the controller controls the fifth electromagnet 34 to lose electricity, the fastener falls under the action of gravity, and automatic sorting and rejecting of the unqualified fastener are realized.
A quick screening method for the external thread size of a fastener comprises the following steps:
s1, fixing two sides and the bottom of the top of a screw 4 horizontally placed by a fastener through a fixing mechanism;
s2, the controller controls the first miniature electric push rod 8 to extend for a set distance, and the first shell 15 is pushed to the top of the screw 4;
s3, tightly abutting against the crests and the bottoms of the external threads at the top of the screw 4 through the test needle 21, compressing the spring 25 at the moment, enabling the first pressure sensor 26 to bear the pressure of the pressing plate, and sending the pressure to the controller;
s4, after receiving the pressure value of the first pressure sensor 26, the controller calculates the pressure difference, compares the pressure value and the pressure difference with the set pressure value and the set pressure difference range, and controls the alarm to alarm when the pressure value or the pressure difference range is not in the set range;
s5, determining the position of an unqualified fastener according to the position of the alarm;
s6, removing unqualified fasteners.
According to the invention, the two sides and the bottom of the top of the screw rod of the fastener are fixed through the fixing mechanism, and the controller is used for controlling the first miniature electric push rod to extend for a set distance so as to push the first shell to the top of the screw rod; the spring is compressed at the moment through the crest and the root of the external thread of the test needle tightly abutted against the top of the screw, and the first pressure sensor receives the pressure of the pressing plate and sends the pressure to the controller; after the controller receives the pressure values of the first pressure sensors, the pressure difference between the two adjacent first pressure sensors is calculated, the pressure values detected by the plurality of first pressure sensors and the pressure difference between the two adjacent first pressure sensors are compared with the set pressure values and the range of the pressure difference, when the pressure values or the range of the pressure difference are not in the set range, the controller controls the alarm to give an alarm, the top and the bottom of the external thread of the fastener are automatically detected, time and labor are saved, and meanwhile errors detected manually are avoided.
According to the invention, the first electromagnets on opposite surfaces of the two adjacent second shells are controlled by the controller to be electrified to realize the same magnetic poles, repulsive force is generated, the sliding sleeve is driven to slide on the sliding rod under the action of the repulsive force, the distance between the two adjacent second shells is increased, when the controller controls the first electromagnets on opposite surfaces of the two adjacent second shells to be electrified to realize the same magnetic poles, attractive force is generated, the sliding sleeve is driven to slide on the sliding rod under the action of the attractive force, the distance between the two adjacent second shells is reduced, and the distance between the two adjacent second shells is adjusted by the controller to realize the adjustment of the current.
According to the invention, the second electromagnet is arranged in the first shell, the third electromagnet is arranged at the top of the sliding sleeve and the top of the first supporting plate, the current of the second electromagnet and the current of the third electromagnet are controlled by the controller, attractive force is generated between the second electromagnet and the third electromagnet, the sliding sleeve can overcome the gravity of parts inside a second subject under the action of the attractive force, the sliding sleeve is not in contact with the sliding rod and is in a magnetic suspension state, friction with the sliding rod in the moving process of the sliding sleeve can be avoided, meanwhile, the fourth electromagnets are arranged at the left side and the right side of the sliding sleeve, the current of the fourth electromagnet is controlled by the controller, and the sliding sleeve can easily slide on the sliding rod to adjust the distance between two adjacent detection units.
According to the invention, the controller controls the driving motor to drive the two gears to move in opposite directions, so that the two conveying belts on the four belt wheels clamp and convey the screw rods, and the fastener is automatically conveyed, thereby meeting the requirement of automatic production detection.
According to the invention, the second miniature electric push rod can be used for adjusting the height of the second supporting plate according to the thickness of the screw rod, and the second pressure sensor and the third pressure sensor can be used for stably fixing the screw rod by the fixing mechanism, so that the problem of inaccurate detection caused by screw rod movement in the detection process is avoided.
According to the invention, the screw is limited and fixed through the first positioning groove and the second positioning groove, so that the problem of inaccurate detection caused by sliding of the screw in the process of abutting the test needle is avoided.
According to the invention, the plurality of step limiting blocks are arranged in the first positioning groove and the second positioning groove, so that the fasteners with different specifications can be stably limited and fixed.
When the alarm gives an alarm, the controller controls the third miniature electric push rod to extend, the bolt head is sleeved through the sleeve joint, the controller controls the current of the fifth electromagnet to adsorb the bolt head, the fastener is detached from the conveyor belt, then the controller controls the steering engine to rotate for a certain angle to drive the unqualified fastener to rotate for a certain angle, the controller controls the fifth electromagnet to lose electricity, the fastener falls under the action of gravity, and automatic sorting of the unqualified fastener is realized.
The foregoing disclosure is merely illustrative of some embodiments of the invention, but the embodiments are not limited thereto and variations within the scope of the invention will be apparent to those skilled in the art.
Claims (9)
1. A fastener external thread size rapid screening device, comprising:
the fixing mechanism is used for fixing the two sides and the bottom of the top of the screw (4) horizontally placed by the fastening piece;
detection mechanism for detect the external screw thread at screw rod (4) top, detection mechanism includes:
a bracket (5) arranged around the fastener;
the first miniature electric push rod (8) is arranged on the bracket (5), and the push rod head is arranged downwards;
the first shell (15) is fixedly connected with the push rod head of the first miniature electric push rod (8);
a plurality of detecting elements, arranged in a matrix on a first housing (15), each detecting element comprising:
a first support plate (27) provided in the first housing (15);
the second casing (24), the upper end is fixed with the bottom of first backup pad (27), be equipped with in the second casing (24):
a first pressure sensor (26) fixed to the top of the second housing (24);
the upper end of the spring (25) is connected with a pressing plate, and the pressing plate is positioned right below the first pressure sensor (26);
the top of the limiting plate (22) is fixedly connected with the lower end of the spring (25);
the test needle (21) is vertically arranged, the upper end of the test needle is fixedly connected with the bottom of the limiting plate (22), and the lower end of the test needle sequentially extends out of the second shell (24) and the first shell (15);
the device also comprises a plurality of alarms, and the opposite screw (4) is arranged on the first shell (15);
the controller is arranged in the first shell (15), and the first miniature electric push rod (8), the plurality of first pressure sensors (26) and the plurality of alarms are respectively connected with the controller in an electric signal manner;
the spring (25) is compressed at the moment by testing the crests and roots of the external thread of the needle which is tightly abutted against the top of the screw, the first pressure sensor (26) is subjected to the pressure of the pressing plate, and the pressure is sent to the controller; after the controller receives the pressure values of the first pressure sensors (26), the pressure difference between the two adjacent first pressure sensors (26) is calculated, the pressure values detected by the plurality of first pressure sensors (26) and the pressure difference between the two adjacent first pressure sensors (26) are compared with the set pressure value and the set pressure difference range, and when the pressure value or the pressure difference range is not in the set range, the controller controls the alarm to give an alarm.
2. The quick screening device for the external thread size of the fastener according to claim 1, wherein a plurality of sliding rods (13) which are parallel to each other and have the same interval are horizontally arranged in the first shell (15), a plurality of sliding sleeves (28) are sleeved on the sliding rods (13), the first supporting plates (27) are fixed on the bottom surfaces of the sliding sleeves (28), first electromagnets (14) are arranged on the left side and the right side of the plurality of second shells (24), and the first electromagnets (14) are electrically connected with a controller.
3. The quick screening device for the external thread size of the fastener according to claim 2, wherein a second electromagnet (16) is further arranged in the first shell (15), the second electromagnet (16) is located right above the sliding sleeves (28), the sliding sleeves (28) are of square structures, third electromagnets (28-1) are fixedly arranged at the tops of the first supporting plate (27) and the sliding sleeves (28), fourth electromagnets (28-2) are arranged at the left side and the right side of the sliding sleeves (28), and the second electromagnet (16), the third electromagnets (28-1) and the fourth electromagnets (28-2) are respectively connected with a controller through electric signals.
4. The fastener external thread size quick screening apparatus of claim 1, comprising a conveyor, said conveyor comprising:
a driving motor;
four gears arranged in two gear boxes, two gear boxes arranged at two ends of the fastener detection conveying path, two gears arranged in each gear box, two gears arranged up and down and meshed with each other, a rotating shaft of one gear in the four gears is fixed on an output shaft of a driving motor,
the four belt wheels are sleeved on the rotating shafts of the four gears in a one-to-one correspondence manner;
two conveying belts (12), one of which is sleeved on two belt wheels on the rotating shafts of the two gears at the upper parts of the two gear boxes, and the other of which is sleeved on two belt wheels on the rotating shafts of the two gears at the lower parts of the two gear boxes, and is used for clamping a screw (4) for conveying one end of a fastening piece close to the bolt head (10);
the driving motor is in electrical signal connection with the controller.
5. The fastener external thread size quick screening apparatus according to claim 2, wherein said securing mechanism comprises: the first mounting and second mounting, first mounting and second mounting set up in screw rod (4) opposite both sides, first mounting includes:
a first support base (1);
the second miniature electric push rod (2) is fixed on the first supporting seat (1);
the bottom of the second supporting plate (3) is fixedly connected with the push rod head of the second miniature electric push rod (2);
the second pressure sensor is arranged on the top surface of the second supporting plate (3);
the second fixing member includes:
the two third support plates (6) are respectively arranged on the left side and the right side of the first shell (15) through connecting rods (7);
the third pressure sensors are arranged on the bottom surfaces of the two third support plates (6);
the second miniature electric push rod (2), the second pressure sensor and the third pressure sensor are respectively connected with the controller through electric signals.
6. The quick screening device for the external thread size of the fastener according to claim 5, wherein a plurality of first positioning grooves (19) are formed in the second supporting plate (3), a plurality of second positioning grooves (20) are formed in the third supporting plate (6), the first positioning grooves (19) and the second positioning grooves (20) are symmetrically arranged relatively, and the positions of the first positioning grooves (19) and the second positioning grooves (20) are matched with the positions of the sliding rods (13) for clamping and fixing the screw (4).
7. The quick screening device for the external thread size of the fastener according to claim 6, wherein a plurality of step limiting blocks are arranged in the first positioning groove (19) and the second positioning groove (20), and the second pressure sensor and the third pressure sensor are respectively arranged on the step limiting blocks.
8. The fastener external thread size quick screening apparatus as recited in claim 1, further comprising: sorting mechanism for sort the unqualified fastener of external screw thread size detection, sorting mechanism includes:
the second supporting seat (29) is positioned at the left side of the bolt head (10);
the steering engine (30) is arranged on the second supporting seat (29);
the third miniature electric push rod (31) is arranged on a rudder disc of the steering engine (30);
the sleeve joint (32) is fixed on the push rod head of the third miniature electric push rod (31), and the right end of the sleeve joint (32) is opened;
a fifth electromagnet (33) arranged at the bottom in the socket joint (32);
the steering engine (30) and the fifth electromagnet (33) are respectively connected with the controller through signals.
9. A screening method using the fastener external thread size rapid screening apparatus according to any one of claims 1 to 8, comprising the steps of:
s1, fixing two sides and the bottom of the top of a screw (4) horizontally placed by a fastener through a fixing mechanism;
s2, the controller controls the first miniature electric push rod (8) to extend for a set distance, and the first shell (15) is pushed to the top of the screw rod (4);
s3, tightly abutting against the crests and the bottoms of the external threads at the top of the screw rod (4) through the test needle (21), compressing the spring (25), enabling the first pressure sensor (26) to receive the pressure of the pressing plate, and sending the pressure to the controller;
s4, after receiving the pressure value of the first pressure sensor (26), the controller calculates the pressure difference, compares the pressure value and the pressure difference with the set pressure value and the set pressure difference range, and controls the alarm to alarm when the pressure value or the pressure difference range is not in the set range;
s5, determining the position of an unqualified fastener according to the position of the alarm;
s6, removing unqualified fasteners.
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| CN111424508A (en) * | 2020-04-24 | 2020-07-17 | 福建省永正工程质量检测有限公司 | Device and method for detecting flatness of highway bridge |
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| JP2903826B2 (en) * | 1992-01-27 | 1999-06-14 | 日産自動車株式会社 | Internal thread measuring device |
| JP2001264038A (en) * | 2000-03-21 | 2001-09-26 | Mitsubishi Electric Corp | Screw thread chipping detector and screw thread chipping detecting method |
| CN207516017U (en) * | 2017-12-08 | 2018-06-19 | 青岛铸辉铜业有限公司 | A kind of screw thread Smart Verify device |
| CN111929046B (en) * | 2020-07-31 | 2022-03-08 | 山东高强紧固件有限公司 | Nut thread detection equipment |
| CN112304237A (en) * | 2020-12-09 | 2021-02-02 | 东莞市夯牛机电科技有限公司 | Thread depth detection device for machining automobile gear lever |
| CN113663923A (en) * | 2021-08-12 | 2021-11-19 | 重庆优云迪科技有限公司 | Detection apparatus for nonstandard bolt processing apparatus has spacing clamping function |
| CN215823696U (en) * | 2021-09-09 | 2022-02-15 | 安徽科技学院 | Detection apparatus capable of automatically detecting thread specifications based on PLC |
| CN113701607B (en) * | 2021-10-27 | 2022-01-28 | 山东高强紧固件有限公司 | Thread detection device |
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| CN111424508A (en) * | 2020-04-24 | 2020-07-17 | 福建省永正工程质量检测有限公司 | Device and method for detecting flatness of highway bridge |
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