Magnetic strength detection device and detection method for detecting magnetism of magnetic shoe
阅读说明：本技术 一种用于检查磁瓦磁性的磁性强度检测装置及其检测方法 (Magnetic strength detection device and detection method for detecting magnetism of magnetic shoe ) 是由 唐睿 史世斌 陶子龙 于 2019-10-11 设计创作，主要内容包括：本发明公开一种用于检查磁瓦磁性的磁性强度检测装置及其检测方法,该装置包括检测架、升降平台、夹紧机构、定位机构、拉力检测机构、距离检测机构以及运算控制器。升降平台包括搭载台、导向柱以及升降组件。夹紧机构包括支撑块、双轴电机、螺纹杆、导向杆以及夹板。定位机构包括水平检测板、水平传感器、定位块以及调节组件。拉力检测机构包括拉力传感器、挂绳以及磁性球,距离检测机构包括测距传感器一、测距传感器二、测距传感器三以及测距传感器四。运算控制器根据拉力传感器检测的拉力,先计算出拉力增加值,再查询获得磁瓦所对应的磁性强度。本发明实现对检测位置的准确定位,提高检测精度,误差小,使检测更加敏感,可以提高检测效率。(The invention discloses a magnetic strength detection device for detecting magnetism of a magnetic shoe and a detection method thereof. The lifting platform comprises a carrying platform, a guide post and a lifting assembly. The clamping mechanism comprises a supporting block, a double-shaft motor, a threaded rod, a guide rod and a clamping plate. The positioning mechanism comprises a horizontal detection plate, a horizontal sensor, a positioning block and an adjusting component. The tension detection mechanism comprises a tension sensor, a hanging rope and a magnetic ball, and the distance detection mechanism comprises a first distance measurement sensor, a second distance measurement sensor, a third distance measurement sensor and a fourth distance measurement sensor. And the operation controller calculates the tension increase value according to the tension detected by the tension sensor and then inquires to obtain the magnetic strength corresponding to the magnetic shoe. The invention realizes accurate positioning of the detection position, improves the detection precision, has small error, makes the detection more sensitive and can improve the detection efficiency.)
1. A magnetic strength detecting apparatus for inspecting magnetism of a magnetic shoe, comprising:
a detection frame (1);
characterized in that, the magnetic strength detection device for checking the magnetism of the magnetic shoe further comprises:
the lifting platform comprises a carrying platform (2), at least two guide columns (3) and a lifting assembly; the bottom end of the guide post (3) is fixed on the bottom wall of the detection frame (1), and the top end of the guide post penetrates through the lapping table (2); the lifting assembly is used for driving the carrying platform (2) to lift along the central line direction of the guide column (3);
the clamping mechanism comprises a supporting block (4), a double-shaft motor (5), two threaded rods (6), at least one guide rod (7) and two clamping plates (8); the supporting block (4) is fixed on the lapping table (2); the double-shaft motor (5) is arranged on the supporting block (4), and the two output ends of the double-shaft motor are respectively connected with one ends of the two threaded rods (6); the other ends of the two threaded rods (6) are respectively screwed on the two clamping plates (8) and can rotate in the same direction to drive the two clamping plates (8) to approach or separate; the guide rod (7) is fixed on the supporting block (4), and two ends of the guide rod respectively penetrate through the two clamping plates (8); the two clamping plates (8) are used for clamping a magnetic shoe (9), and the convex surface of the magnetic shoe (9) faces the lapping table (2);
the positioning mechanism comprises a horizontal detection plate (10), a horizontal sensor (11), two positioning blocks (12) and an adjusting component; the horizontal detection plate (10) is arranged between the two clamping plates (8) and is lapped on the magnetic shoe (9); the horizontal sensor (11) is arranged on the horizontal detection plate (10) and is used for detecting the levelness of the horizontal detection plate (10); the two positioning blocks (12) are oppositely arranged and respectively correspond to the two clamping plates (8); each positioning block (12) is arranged on the corresponding clamping plate (8) and is provided with a notch for carrying the convex part of the magnetic shoe (9); the adjusting component is used for adjusting the position of the magnetic shoe (9) between the two clamping plates (8);
the tension detection mechanism comprises a tension sensor (13), a hanging rope (14) and a magnetic ball (15); the tension sensor (13) is fixed on the top end of the detection frame (1), and the detection end faces the magnetic shoe (9); one end of the hanging rope (14) is connected with the detection end of the tension sensor (13), and the other end is connected with the magnetic ball (15); a distance is reserved between the magnetic ball (15) and the magnetic shoe (9), and the magnetic ball can generate a pulling force for pulling the tension sensor (13) under the magnetic action of the magnetic shoe (9);
the distance detection mechanism comprises a first distance measurement sensor (16), a second distance measurement sensor (17), a third distance measurement sensor (18) and a fourth distance measurement sensor (19); the first distance measuring sensor (16) is arranged on one clamping plate (8) and is used for detecting the distance L1 between the two clamping plates (8); the second distance measuring sensor (17) is arranged on the supporting block (4) and is used for detecting the distance L2 between the supporting block (4) and the lowest point of the magnetic shoe (9); the distance measuring sensor III (18) is arranged on the mounting platform (2) and is used for detecting the distance L3 between the mounting platform (2) and the tension sensor (13); the distance measuring sensor IV (19) is arranged on the clamping plate (8) and is used for detecting the distance L4 between the contact line of the magnetic shoe (9) and the clamping plate (8) and the supporting block (4) in the vertical direction; and
an arithmetic controller that performs the steps of:
step S1, judging whether the levelness detected by the level sensor (11) is within a preset level range;
when the levelness is not within the preset horizontal range, executing step S2, and driving the adjusting assembly to adjust the magnetic shoe (9) until the levelness is within the preset horizontal range;
when the levelness is within the preset horizontal range, executing step S3, starting the double-shaft motor (5) to enable the two clamping plates (8) to clamp the magnetic shoe (9);
a step S4 of acquiring distances L1, L2, L3, L4 by the distance detection mechanism;
step S5, calculating the radius R of the cylindrical surface where the outer arc surface of the magnetic shoe (9) is located; wherein, the calculation formula of the radius R is as follows:
step S6, calculating the distance L5 between the spherical center of the cylindrical surface where the outer arc surface of the magnetic shoe (9) is located and the spherical center of the magnetic ball (15); the calculation formula of the distance L5 is:
L5＝L3-L6-R-L2-L7
in the formula, L6 is the distance between the tension sensor (13) and the spherical center of the magnetic ball (15), and L7 is the distance between the mounting platform (2) and the second distance measuring sensor (17);
step S7, the lifting assembly drives the carrying platform (2) to move for a distance L5, so that the center of the magnetic ball (15) is located on the center line of the cylindrical surface where the outer arc surface of the magnetic shoe (9) is located; when the distance L5 is a positive value, the mounting platform (2) is driven to rise, and when the distance L5 is a negative value, the mounting platform (2) is driven to fall;
step S8, according to the pulling force detected by the pulling force sensor (13), firstly calculating a pulling force increasing value, and then inquiring and obtaining the magnetic strength corresponding to the magnetic shoe (9) by referring to a data corresponding relation in a preset pulling force increasing value-magnetic strength conversion table; and the tension increase value and the magnetic strength have a one-to-one corresponding data correspondence in the tension increase value-magnetic strength conversion table.
2. The magnetic strength detecting device for inspecting the magnetism of a magnetic shoe according to claim 1, wherein the lifting assembly includes a first electromagnet (20) and a second electromagnet (21); the electromagnet I (20) and the electromagnet II (21) are respectively arranged at the bottom end of the carrying platform (2) and the bottom wall of the detection frame (1) and are oppositely arranged and have the same poles opposite to each other so as to generate a repulsive force for driving the carrying platform (2) to ascend; the operation controller increases/decreases the repulsive force by increasing/decreasing the magnetic field strength of the first electromagnet (20) and the second electromagnet (21) to drive the mounting platform (2) to ascend/descend.
3. The magnetic strength detecting device for inspecting magnetic properties of a magnetic shoe according to claim 1, wherein the lifting assembly includes an electromagnet one (20), an electromagnet two (21), and two springs one (22) respectively corresponding to the at least two guide posts (3); the electromagnet I (20) and the electromagnet II (21) are respectively arranged at the bottom end of the carrying platform (2) and the bottom wall of the detection frame (1) and are oppositely arranged, and opposite poles of the electromagnets are opposite to each other, so that suction force for driving the carrying platform (2) to descend is generated; each spring I (22) is sleeved on the corresponding guide post (3), and two ends of each spring I are respectively connected with the lapping table (2) and the detection frame (1); the arithmetic controller increases/decreases the attraction force by increasing/decreasing the magnetic field strength of the electromagnet I (20) and the electromagnet II (21) so as to drive the mounting platform (2) to ascend/descend.
4. The magnetic strength detecting apparatus for inspecting magnetic properties of a magnetic shoe according to claim 1, wherein the elevating assembly includes an elevating motor (23) and a screw column (24); the lifting motor (23) is arranged on the carrying platform (2), and one output end of the lifting motor is connected with the threaded column (24); the threaded column (24) is in threaded connection with the mounting platform (2), and the mounting platform (2) is lifted along the central line direction of the guide column (3) through rotation; the operation controller controls the lifting motor (23) to rotate, so that the carrying platform (2) moves by a distance L5.
5. The magnetic strength detecting apparatus for inspecting the magnetism of a magnetic shoe according to claim 1, wherein the adjusting assembly includes two support plates (25) corresponding to the two chucking plates (8), respectively, two telescopic members (26) corresponding to the two support plates (25), respectively, and two pushing blocks (27) corresponding to the two telescopic members (26), respectively; each supporting plate (25) is arranged on the corresponding clamping plate (8) and is provided with a through hole (28) for the electromagnetic wave generated by the distance measuring sensor four (19) to pass through; each telescopic piece (26) is arranged on the corresponding support plate (25), and the telescopic end faces the magnetic shoe (9); each pushing block (27) is fixed on the telescopic end of the corresponding telescopic piece (26) and props against the convex surface of the magnetic shoe (9);
when the levelness is not within the preset horizontal range, the operation controller drives the telescopic piece (26) close to the downward inclined end of the horizontal detection plate (10) to extend out until the levelness is within the preset horizontal range.
6. The magnetic strength detecting device for inspecting the magnetism of a magnetic shoe according to claim 1, wherein the adjusting means includes an electromagnet three (29), an electromagnet four (30), and two support plates (25) respectively corresponding to the two clamping plates (8); each supporting plate (25) is arranged on the corresponding clamping plate (8) and is provided with a through hole (28) for the electromagnetic wave generated by the distance measuring sensor four (19) to pass through; the electromagnet III (29) and the electromagnet IV (30) are respectively arranged on the two supporting plates (25) and are used for generating magnetic fields with the same attraction force on the two opposite sides of the magnetic shoe (9); and the operation controller drives the symmetry axis of the magnetic shoe (9) to pass through the detection end of the second distance measurement sensor (17) by increasing the magnetic field intensity of the electromagnet three (29) and the electromagnet four (30).
7. The magnetic strength detecting apparatus for inspecting the magnetism of a magnetic shoe according to claim 1, wherein the positioning block (12) has an H-shaped longitudinal section parallel to the center line of the magnetic shoe (9); a through hole (31) is formed in the part, close to the clamping plate (8), of the positioning block (12), and the through hole (31) is used for allowing electromagnetic waves generated by the distance measuring sensor four (19) to pass through.
8. The magnetic strength testing apparatus for testing magnetic properties of a magnetic shoe according to claim 1, wherein the increase value of the tensile force is calculated by the formula:
wherein Δ is the tension increase value, F is the tension detected by the tension sensor (13), and m is1Is the weight of the hanging rope (14), m2Is the weight of the magnetic ball (15), and g is the acceleration of gravity.
9. The magnetic strength detecting device for inspecting the magnetism of a magnetic shoe according to claim 1, wherein the clamping mechanism further comprises at least two sets of buffer members; each group of buffer components comprises two second springs (32); the two springs II (32) are sleeved on the guide rod (7) and are respectively positioned at two opposite sides of the supporting block (4).
10. A magnetic strength detecting method for inspecting magnetic properties of a magnetic shoe, which is applied to the magnetic strength detecting apparatus for inspecting magnetic properties of a magnetic shoe according to any one of claims 1 to 9, characterized by comprising the steps of:
step S1, judging whether the levelness detected by the level sensor (11) is within a preset level range;
when the levelness is not within the preset horizontal range, executing step S2, and driving the adjusting assembly to adjust the magnetic shoe (9) until the levelness is within the preset horizontal range;
when the levelness is within the preset horizontal range, executing step S3, starting the double-shaft motor (5) to enable the two clamping plates (8) to clamp the magnetic shoe (9);
a step S4 of acquiring distances L1, L2, L3, L4 by the distance detection mechanism;
step S5, calculating the radius R of the cylindrical surface where the outer arc surface of the magnetic shoe (9) is located; wherein, the calculation formula of the radius R is as follows:
step S6, calculating the distance L5 between the center line of the cylindrical surface where the outer arc surface of the magnetic shoe (9) is located and the spherical center of the magnetic ball (15); the calculation formula of the distance L5 is:
L5＝L3-L6-R-L2-L7
in the formula, L6 is the distance between the tension sensor (13) and the spherical center of the magnetic ball (15), and L7 is the distance between the mounting platform (2) and the second distance measuring sensor (17);
step S7, the lifting assembly drives the carrying platform (2) to move for a distance L5, so that the center of the magnetic ball (15) is located at the center of the spherical surface where the outer arc surface of the magnetic shoe (9) is located; when the distance L5 is a positive value, the mounting platform (2) is driven to rise, and when the distance L5 is a negative value, the mounting platform (2) is driven to fall;
step S8, according to the pulling force detected by the pulling force sensor (13), firstly calculating a pulling force increasing value, and then inquiring and obtaining the magnetic strength corresponding to the magnetic shoe (9) by referring to a data corresponding relation in a preset pulling force increasing value-magnetic strength conversion table; and the tension increase value and the magnetic strength have a one-to-one corresponding data correspondence in the tension increase value-magnetic strength conversion table.
Technical Field
The invention relates to a magnetic strength detection device in the technical field of detection, in particular to a magnetic strength detection device for detecting the magnetism of a magnetic shoe and a magnetic strength detection method for detecting the magnetism of the magnetic shoe.
Background
The magnetic shoe is one of the main products of ferrite permanent magnetic materials, is an important component in a motor, is applied to a plurality of fields, is widely applied in the industrial fields of automobiles, household appliances, electric tools and the like, and has huge second-stage demand. In general, a magnetic shoe is a strontium ferrite, which is used as an excitation of a permanent magnet motor, and a brush dc motor is placed in a stator and a brushless motor is placed in a rotor.
The production process flow of the prior magnetic shoe generally comprises the following steps: proportioning, smelting and casting ingot, crushing, pulverizing, pressing, sintering and tempering, magnetic detection, grinding, machining, electroplating, magnetizing and packaging. However, in the production process of the magnetic shoe, the magnetic detection of the magnetic shoe is very important because the magnetic detection relates to the magnetizing amount, and the magnetism of the magnetic shoe needs to be further detected after the magnetization, but the current magnetic detection device cannot perform directional detection on the magnetic shoe with a unique shape, and the center line of the cylindrical surface where the outer arc surface of the magnetic shoe is located is difficult to find by adopting a manual detection mode, so that the problem of large detection error is caused.
Disclosure of Invention
The invention provides a magnetic strength detection device and a detection method for detecting magnetism of a magnetic shoe, aiming at solving the technical problems that the existing magnetic detection device can not carry out directional detection on the magnetic shoe with a unique shape and has large detection error caused by adopting a manual detection mode.
The invention is realized by adopting the following technical scheme: a magnetic strength detecting apparatus for inspecting magnetism of a magnetic shoe, comprising:
a detection frame;
the lifting platform comprises a carrying platform, at least two guide columns and a lifting assembly; the bottom end of the guide post is fixed on the bottom wall of the detection frame, and the top end of the guide post penetrates through the lapping table; the lifting assembly is used for driving the carrying platform to lift along the direction of the central line of the guide post;
the clamping mechanism comprises a supporting block, a double-shaft motor, two threaded rods, at least one guide rod and two clamping plates; the supporting block is fixed on the lapping platform; the double-shaft motor is arranged on the supporting block, and the two output ends of the double-shaft motor are respectively connected with one ends of the two threaded rods; the other ends of the two threaded rods are respectively screwed on the two clamping plates and can rotate in the same direction to drive the two clamping plates to approach or separate from each other; the guide rod is fixed on the supporting block, and two ends of the guide rod respectively penetrate through the two clamping plates; the two clamping plates are used for clamping a magnetic tile, and the convex surface of the magnetic tile faces the carrying platform;
the positioning mechanism comprises a horizontal detection plate, a horizontal sensor, two positioning blocks and an adjusting component; the horizontal detection plate is arranged between the two clamping plates and is lapped on the magnetic shoe; the horizontal sensor is arranged on the horizontal detection plate and used for detecting the levelness of the horizontal detection plate; the two positioning blocks are oppositely arranged and respectively correspond to the two clamping plates; each positioning block is arranged on the corresponding clamping plate and is provided with a notch for carrying the convex surface part of the magnetic shoe; the adjusting component is used for adjusting the position of the magnetic shoe between the two clamping plates;
the tension detection mechanism comprises a tension sensor, a hanging rope and a magnetic ball; the tension sensor is fixed on the top end of the detection frame, and the detection end faces the magnetic shoe; one end of the hanging rope is connected to the detection end of the tension sensor, and the other end of the hanging rope is connected to the magnetic ball; a distance is reserved between the magnetic ball and the magnetic shoe, and the magnetic ball can generate a pulling force for pulling the tension sensor under the magnetic action of the magnetic shoe;
the distance detection mechanism comprises a first distance measurement sensor, a second distance measurement sensor, a third distance measurement sensor and a fourth distance measurement sensor; the first distance measuring sensor is arranged on one clamping plate and is used for detecting the distance L1 between the two clamping plates; the distance measuring sensor II is arranged on the supporting block and is used for detecting the distance L2 between the supporting block and the lowest point of the magnetic shoe; the distance measuring sensor III is arranged on the mounting platform and used for detecting the distance L3 between the mounting platform and the tension sensor; the distance measuring sensor IV is arranged on the clamping plate and is used for detecting the distance L4 between the magnetic shoe and the clamping plate contact line in the vertical direction and the same supporting block; and
an arithmetic controller that performs the steps of:
step S1, judging whether the levelness detected by the level sensor is within a preset level range;
when the levelness is not within the preset horizontal range, executing step S2 to drive the adjusting assembly to adjust the magnetic shoe until the levelness is within the preset horizontal range;
when the levelness is within the preset horizontal range, executing step S3, and starting the double-shaft motor to enable the two clamping plates to clamp the magnetic shoe;
a step S4 of acquiring distances L1, L2, L3, L4 by the distance detection mechanism;
step S5, calculating the radius R of the cylindrical surface where the outer arc surface of the magnetic shoe is located; wherein, the calculation formula of the radius R is as follows:
step S6, calculating the distance L5 between the spherical center of the cylindrical surface where the outer arc surface of the magnetic shoe is located and the spherical center of the magnetic ball; the calculation formula of the distance L5 is:
L5＝L3-L6-R-L2-L7
in the formula, L6 is the distance between the tension sensor and the spherical center of the magnetic ball, and L7 is the distance between the carrying platform and the distance measuring sensor II;
step S7, the carrying platform is driven to move for a distance L5 through the lifting component, and the sphere center of the magnetic ball is located on the center line of the cylindrical surface where the outer arc surface of the magnetic shoe is located; when the distance L5 is a positive value, the carrying platform is driven to rise, and when the distance L5 is a negative value, the carrying platform is driven to fall;
step S8, according to the pulling force detected by the pulling force sensor, firstly calculating a pulling force increasing value, and then inquiring and obtaining the magnetic strength corresponding to the magnetic shoe by referring to a data corresponding relation in a preset pulling force increasing value-magnetic strength conversion table; and the tension increase value and the magnetic strength have a one-to-one corresponding data correspondence in the tension increase value-magnetic strength conversion table.
The invention detects whether the magnetic shoe is placed obliquely or not through the horizontal detection plate and the horizontal sensor, and adjusts the position of the magnetic shoe through the adjusting component when the magnetic shoe is tilted, so that the two arc-shaped ends of the magnetic shoe are positioned on the same horizontal plane, the data can be detected more accurately through the distance detection mechanism, the center line of the outer cylindrical surface of the magnetic shoe can be directly positioned under the magnetic ball, the center of the magnetic ball is conveniently positioned on the center line, the magnetic ball can be pulled under the magnetic action of the magnetic shoe, the tension sensor is pulled through the hanging rope to detect the tension, the tension increment borne by the tension sensor is equal to the acting force of the magnetic shoe on the magnetic ball, the magnetic strength of the magnetic shoe can be deduced through the tension increment, and the problem that the existing magnetic detection device can not carry out directional detection on the magnetic shoe with a unique shape is solved, the technical problem of large detection error caused by adopting a manual detection mode is solved, the detection precision is high, the error is small, the magnetic strength is detected at the magnetic center of the magnetic shoe, the detection is more sensitive, and the accurate magnetic strength can be still detected even under the condition that the magnetic action of the magnetic shoe is small.
As a further improvement of the above scheme, the lifting assembly comprises a first electromagnet and a second electromagnet; the first electromagnet and the second electromagnet are respectively arranged at the bottom end of the carrying platform and the bottom wall of the detection frame, are oppositely arranged, have the same poles, and generate repulsion force for driving the carrying platform to rise; the operation controller increases/decreases the repulsive force by increasing/decreasing the magnetic field strength of the first electromagnet and the second electromagnet so as to drive the mounting platform to ascend/descend.
As a further improvement of the above scheme, the lifting assembly comprises a first electromagnet, a second electromagnet and two first springs respectively corresponding to the at least two guide posts; the first electromagnet and the second electromagnet are respectively arranged at the bottom end of the carrying platform and the bottom wall of the detection frame, are oppositely arranged, and have opposite poles so as to generate suction force for driving the carrying platform to descend; each spring is sleeved on the corresponding guide post, and two ends of each spring are respectively connected with the lapping table and the detection frame; the operation controller increases/decreases the attraction force by increasing/decreasing the magnetic field strength of the first electromagnet and the second electromagnet so as to drive the carrying platform to ascend/descend.
As a further improvement of the above solution, the lifting assembly comprises a lifting motor and a threaded column; the lifting motor is arranged on the lapping platform, and one output end of the lifting motor is connected with the threaded column; the threaded column is in threaded connection with the carrying platform, and the carrying platform is lifted along the direction of the central line of the guide column through rotation; the calculation controller controls the lifting motor to rotate, so that the carrying platform moves by a distance L5.
As a further improvement of the above scheme, the adjusting assembly comprises two supporting plates respectively corresponding to the two clamping plates, two telescopic pieces respectively corresponding to the two supporting plates, and two pushing blocks respectively corresponding to the two telescopic pieces; each supporting plate is arranged on the corresponding clamping plate and is provided with a through hole for the electromagnetic wave generated by the distance measuring sensor IV to pass through; each telescopic piece is arranged on the corresponding supporting plate, and the telescopic end of each telescopic piece faces the magnetic shoe; each pushing block is fixed on the telescopic end of the corresponding telescopic piece and abuts against the convex surface of the magnetic shoe;
and when the levelness is not within the preset horizontal range, the operation controller drives the telescopic piece close to the downward inclined end of the horizontal detection plate to extend out until the levelness is within the preset horizontal range.
As a further improvement of the above scheme, the adjusting assembly comprises an electromagnet three, an electromagnet four and two supporting plates respectively corresponding to the two clamping plates; each supporting plate is arranged on the corresponding clamping plate and is provided with a through hole for the electromagnetic wave generated by the distance measuring sensor IV to pass through; the electromagnet III and the electromagnet IV are respectively arranged on the two supporting plates and are used for generating magnetic fields with the same attraction force on the two opposite sides of the magnetic shoe; and the operation controller drives the symmetry axis of the magnetic shoe to pass through the detection end of the distance measuring sensor II by increasing the magnetic field intensity of the electromagnet III and the electromagnet IV.
As a further improvement of the scheme, the longitudinal section of the positioning block is H-shaped, and the section is parallel to the central line of the magnetic shoe; and a through hole is formed in the part of the positioning block, which is close to the clamping plate, and the through hole is used for allowing the electromagnetic waves generated by the distance measuring sensor IV to pass through.
As a further improvement of the above scheme, the calculation formula of the tension increase value is as follows:
wherein Δ is the tension increase value and F is detected by the tension sensorTensile force, m1M is the weight of the hanging rope2Is the weight of the magnetic ball and g is the acceleration of gravity.
As a further improvement of the above scheme, the clamping mechanism further comprises at least two groups of buffer assemblies; each group of buffer components comprises two springs II; the two springs are sleeved on the guide rod and are respectively positioned at two opposite sides of the supporting block.
The present invention also provides a magnetic strength detecting method for detecting magnetic properties of a magnetic shoe, which is applied to any of the above-mentioned magnetic strength detecting apparatuses for detecting magnetic properties of a magnetic shoe, and which includes the steps of:
step S1, judging whether the levelness detected by the level sensor is within a preset level range;
when the levelness is not within the preset horizontal range, executing step S2 to drive the adjusting assembly to adjust the magnetic shoe until the levelness is within the preset horizontal range;
when the levelness is within the preset horizontal range, executing step S3, and starting the double-shaft motor to enable the two clamping plates to clamp the magnetic shoe;
a step S4 of acquiring distances L1, L2, L3, L4 by the distance detection mechanism;
step S5, calculating the radius R of the cylindrical surface where the outer arc surface of the magnetic shoe is located; wherein, the calculation formula of the radius R is as follows:
step S6, calculating the distance L5 between the center line of the cylindrical surface where the outer arc surface of the magnetic shoe is located and the spherical center of the magnetic ball; the calculation formula of the distance L5 is:
L5＝L3-L6-R-L2-L7
in the formula, L6 is the distance between the tension sensor and the spherical center of the magnetic ball, and L7 is the distance between the carrying platform and the distance measuring sensor II;
step S7, the carrying platform is driven to move for a distance L5 through the lifting component, and the sphere center of the magnetic ball is located at the sphere center of the spherical surface where the outer arc surface of the magnetic shoe is located; when the distance L5 is a positive value, the carrying platform is driven to rise, and when the distance L5 is a negative value, the carrying platform is driven to fall;
step S8, according to the pulling force detected by the pulling force sensor, firstly calculating a pulling force increasing value, and then inquiring and obtaining the magnetic strength corresponding to the magnetic shoe by referring to a data corresponding relation in a preset pulling force increasing value-magnetic strength conversion table; and the tension increase value and the magnetic strength have a one-to-one corresponding data correspondence in the tension increase value-magnetic strength conversion table.
Compared with the prior art, the magnetic strength detection device and the detection method for detecting the magnetism of the magnetic shoe have the following beneficial effects:
the magnetic strength detection device for detecting the magnetism of the magnetic shoe firstly clamps the magnetic shoe through the clamping mechanism, when in clamping, the threaded rod is rotated by the rotation of the double-shaft motor, at the moment, the two clamping plates can be drawn close to each other, so that the magnetic shoe between the clamping plates is clamped, simultaneously, the horizontal detection plate and the horizontal sensor in the positioning mechanism can detect the levelness when the magnetic shoe is inclined, thus, the operation controller can adjust the position of the magnetic shoe through the adjusting component according to the levelness, so that the plane where the two arc ends of the magnetic shoe are positioned is superposed with the horizontal plane, and the data can be more accurately detected through the distance detection mechanism, and the central line of the outer cylindrical surface of the magnetic shoe can be directly positioned under the magnetic ball, so as to be convenient for subsequently arranging the center of the magnetic ball on the central line, thereby the magnetic ball can be pulled under the magnetic action of the magnetic shoe, and then pull force sensor through hanging the rope and draw in order to detect pulling force, because the pulling force increment that force sensor received is equal with the effort of magnetic shoe to the magnetic ball, just can deduce the magnetic strength of magnetic shoe through the pulling force increment.
In the magnetic field of the magnetic shoe, the magnetic induction lines of the magnetic shoe point to the central line of the cylindrical surface where the inner arc surface and the outer arc surface of the magnetic shoe are located, and the magnetic flux is maximum at the central line, so that the magnetic field intensity at the position is maximum. According to the invention, the operation controller firstly calculates the radius of the cylindrical surface where the outer arc surface of the magnetic shoe is located according to each distance detected by the distance detection mechanism, then calculates the distance between the spherical center of the magnetic ball and the central line of the cylindrical surface according to the radius, and finally drives the lifting assembly to lift for a corresponding distance, so that the spherical center of the magnetic ball is located on the central line of the cylindrical surface where the outer arc surface of the magnetic shoe is located, the accurate positioning of the detection position is realized, and the detection precision is further improved. At the moment, the magnetic acting force applied to the magnetic ball reaches the maximum, the magnetic ball can pull the hanging rope and further pull the tension sensor, and the detection value of the tension sensor is changed. The tension sensor directly detects the total weight of the magnetic ball and the hanging rope when the magnetic ball is not under the action of the magnetic shoe, the detected tension is increased after the magnetic ball is under the action of the magnetic shoe, and the increase is the action of the magnetic shoe on the magnetic ball. Therefore, the operation controller can directly obtain the magnetic strength of the magnetic shoe according to the corresponding conversion table, and the detection precision is very high and the error is very small because the detection is carried out at the place where the magnetic field strength of the magnetic shoe is maximum, so that the detection is more sensitive, and the accurate magnetic strength can be detected even if the magnetic action of the magnetic shoe is small. In addition, the invention can accurately detect the magnetism of the magnetic shoe, so that the magnetic shoe with overlarge or overlow magnetic strength can be screened out in time in the production process of the magnetic shoe and is respectively treated correspondingly, thereby improving the production quality of the magnetic shoe. Simultaneously, in the maintenance after the magnetic shoe uses detects, measurement personnel can directly detect single magnetic shoe, and the magnetic shoe of equidimension not can all carry out the centre gripping through clamping mechanism moreover, and need not the manual work and detect, can improve detection efficiency, detects degree of difficulty greatly reduced moreover, reduces detection error.
Drawings
Fig. 1 is a schematic structural view of a magnetic strength detection apparatus for inspecting magnetism of a magnetic shoe according to embodiment 1 of the present invention;
fig. 2 is a distance measuring diagram of the magnetic strength detecting device for checking magnetism of magnetic shoes in fig. 1 at the time of distance measuring;
fig. 3 is a control flowchart of an arithmetic controller of the magnetic strength detecting apparatus for checking magnetism of a magnetic shoe of fig. 1;
fig. 4 is a schematic structural view of a magnetic strength detection apparatus for inspecting magnetism of a magnetic shoe according to
FIG. 5 is a schematic structural view of a magnetic strength detecting apparatus for inspecting magnetism of a magnetic shoe according to
FIG. 6 is a schematic structural view of a magnetic strength detecting apparatus for inspecting magnetism of a magnetic shoe according to
fig. 7 is a schematic structural view of a magnetic strength detection apparatus for inspecting magnetism of a magnetic shoe according to
Description of the symbols:
1
2 carrying
3 guide
4 supporting
5 two-
6 threaded
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8
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10 horizontal detecting
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15 magnetic ball 32 spring two
16 ranging sensor-33 ranging board-one
17 second
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
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