CN112798086A - Cylinder-like weighing equipment and weighing method - Google Patents
Cylinder-like weighing equipment and weighing method Download PDFInfo
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Abstract
The invention discloses cylinder-like weighing equipment which comprises first weighing equipment and second weighing equipment, wherein the weight value of a cylinder-like body is measured by utilizing a first weighing equipment fulcrum weighing method, the downward shifting quantity Y and the displacement Z of the cylinder-like body are calculated according to a moment balance principle formula, the data error of the downward shifting quantity Y and the displacement Z obtained by respectively rotating the same cylinder-like body by 120 degrees and 240 degrees on the first weighing equipment is 0.1-0.2 mm, the measurement result is stable and accurate, the measurement repeatability is good, the cylinder-like product detection efficiency is improved, the balance weight of a subsequent cylinder-like product is facilitated, and the production efficiency of the cylinder-like product is improved. The method for measuring the weight value of the similar cylinder by using the fulcrum weighing of the second weighing equipment is utilized, and the gravity center distance X of the similar cylinder is calculated.
Description
Technical Field
The invention relates to the technical field of cylinder-like weighing, in particular to cylinder-like weighing equipment and a weighing method.
Background
The balance weight is an important index in the production of products and plays a key role in the performance of the products. In the past, a standard weighing tool is mainly used for measuring downward shift Y and displacement Z of a cylinder, the standard weighing tool is connected with a product and operated in a water pool, the calculated downward shift Y and displacement Z data need to be removed from the weight of the standard weighing tool, and the accuracy is not high. In the past, a hanging type measuring method is used, and a hanging strip or a steel rope is used for measuring the gravity center distance X of a product, so that the operation is troublesome and the accuracy is low.
Disclosure of Invention
Aiming at the defects in the prior art, the inventor carries out further design research, measures the weight value of the cylinder-like body by using a fulcrum weighing method, calculates the downward displacement Y and the displacement Z of the cylinder-like body according to a moment balance principle formula, and has good measurement repeatability and high result precision. The weight value of the cylinder is measured by using a two-point weighing method, the gravity center distance X of the cylinder is calculated, the height of the second supporting plate can be adjusted, the cylinder is ensured to be in a horizontal state, the measurement errors caused by the width of a hanging strip and the verticality vision easily caused by the traditional hanging measurement are eliminated, the consistency of subsequent cylinder products is improved, and the stable and reliable performance of the cylinder products is ensured.
Specifically, the invention provides cylinder-like weighing equipment and a weighing method.
The purpose of the invention is realized as follows:
a cylinder-like weighing apparatus comprising a first weighing apparatus and a second weighing apparatus, wherein:
the first weighing equipment comprises a first base placed on a reference platform, a plurality of first supporting sensors are arranged at the edge of the upper surface of the first base, a first fixing plate is arranged on each first supporting sensor, a support is fixed on each first fixing plate, a tip is arranged above each support, steel balls are placed in round hole platforms above the tips, and a first supporting plate is supported on each steel ball.
The second weighing equipment comprises a second base placed on the reference platform, reinforcing strips are symmetrically arranged on the lower surfaces of two short edges of the second base, second support multiple sensors are symmetrically arranged on the upper surfaces of two long edges of the second base, a second fixing plate is arranged on each second support multiple sensor, a supporting plate is fixed on each second fixing plate, a second supporting plate is vertically connected to each supporting plate, and a positioning plate is arranged on the outer side of each second supporting plate.
Furthermore, the first support multiple sensors are uniformly distributed on the edge of the upper portion of the first base, and a first display meter is connected to the first support multiple sensors. The support is connected with the tip through threads.
Furthermore, the lower surface of the first supporting plate is provided with positioning holes which are uniformly distributed and are in butt joint with the steel balls, and the positioning holes are counter bores of 90 degrees.
Further, a second display list is connected to the second toli multi-sensor. The inner sides of the second supporting plates are provided with mounting holes, and the connecting devices are mounted between the two symmetrically arranged second supporting plates through the mounting holes. Threaded holes are formed in two ends of the bottom of the second supporting plate connected with the positioning plate, and the height of the second supporting plate can be adjusted through screws.
Furthermore, the positioning plate is arranged on the second supporting plate through a connecting piece, is perpendicular to the supporting plate, is higher than the second supporting plate, and is in a narrow and long strip shape. The upper part of the second supporting plate is in an arc-shaped knife edge shape.
A cylinder-like weighing method comprises the determination of the downward shift amount y and the displacement amount z of a cylinder-like body and the determination of the gravity center distance x of the cylinder-like body.
The determination steps of the downward shift amount y and the displacement amount z of the cylinder-like body are as follows:
the method comprises the following steps of leveling by using a reference platform, placing a first weighing device on the reference platform, peeling and zeroing a first support multiple sensor, placing a cylinder to be measured on a first supporting plate of the first weighing device, and enabling a steel ball to automatically align a positioning hole in the first supporting plate through small-range movement of the steel ball in a center circular platform hole.
The method comprises the steps of using a reference platform as a detection reference, using a tip as a fulcrum, using a plurality of dial indicators to detect the bottom end face of a similar cylinder above each fulcrum, adjusting the level height of the bottom end face of the similar cylinder by vertically adjusting the tip to keep the bottom end face of the similar cylinder horizontal with the reference platform, reading a weight value on a first display meter when the difference between every two data on each dial indicator is not more than 0.01mm, and calculating the downward movement amount y and the displacement amount z of the similar cylinder according to a moment balance principle formula.
The determination step of the gravity center distance x of the cylinder-like body comprises the following steps:
make level with the benchmark platform, place second weighing equipment on the benchmark platform, hold in the palm the multisensor to each second respectively and peel and zero-set, install connecting device between two second backup pads, use two second backup pads as the fulcrum, place the class cylinder level that needs the measurement in two second backup pads, adjust the height of the second backup pad of connecting the locating plate, make class cylinder the central axis keep the level with the benchmark platform, demolish connecting device, read the weight value on the second display list, and calculate the focus distance X of class cylinder through this numerical value.
Further, when three first toli multi-sensors are fixed on the upper edge of the first base, the downward displacement y of the cylinder-like body is calculated according to the moment balance principle formula 1.
From formula 1:
the displacement z of the cylinder-like body is calculated according to the moment balance principle formula 2.
(Gya-Ia)z+(Gyb-Ib)(R*cos(30)+z)＝(Gyc-Ic)(R*cos(30)-z)
From formula 2, one can obtain:
wherein Gya, Gyb and Gyc in formulas 1 and 2 are weight values on three first display tables, respectively. A circle is made by three pivot points, R is the radius of the circle, and the length is 257.5. Ia is one third of the weight of the first support plate, and Ia Ib Ic.
Further, the calculation formula of the barycentric distance X of the cylinder-like body is formula 3.
Wherein Gxa and Gxb in formula 3 are weight values on two second display tables, 374.5 is the distance between two second support plates, and 25.75 is the distance between the second support plate connected to the positioning plate and the positioning plate.
Further, during the measurement process of the gravity center distance x of the cylinder-like body, the cylinder-like body cannot be placed beyond the positioning plate.
The working principle of the invention is as follows:
and ensuring the levelness of the first weighing equipment and the second weighing equipment by using the reference platform.
The first support force multi-sensor is uniformly distributed and fixed on the edge above the first base, and the supporting points are formed on the edge of the upper surface of the first base. Meanwhile, the advantage that the steel balls in the circular table holes in the center can automatically align the positioning holes in the lower surface of the first supporting plate is utilized, so that the lateral friction force of the first support multiple sensor due to the fact that the stress is not vertical is eliminated, and the balance weight is more stable and accurate.
After the reinforcing bar in the second weighing equipment can guarantee that the similar cylinder is placed, the center of gravity falls on the reinforcing bar, and the second weighing equipment is prevented from being unbalanced and turned over. When the cylinder-like body is used for measurement, the two second support multiple sensors can sink and deform due to the weight of the cylinder-like body, and the change of the distance between the two second supporting plates caused by the sinking and deformation of the second support multiple sensors can be avoided by utilizing the connecting device. Meanwhile, the coaxiality of the two second Tuoli multi-sensor supporting points is guaranteed, and the friction force generated by the second Tuoli multi-sensor in the horizontal direction is eliminated, so that the accuracy of the measured value and the accuracy of the calculation result are improved. Because there is forward tilting force when class cylinder is placed, make the sensor produce the moment of torsion, the weight of weighing balance can be less than actual weight, so utilize the screw and the screw hole of connecting the second backup pad bottom both ends of locating plate to adjust the height of the second backup pad of connecting the locating plate, ensure that two second support li multisensors are in the coplanar and reduce this kind of error.
The invention has the beneficial effects that:
all sensors used in the weighing equipment are Torili multi-sensors, and the impact resistance of the Torili multi-sensors is high.
The method for measuring the weight value of the cylinder-like body by utilizing the fulcrum weighing of the first weighing equipment comprises the steps of measuring the weight value of the cylinder-like body, calculating the downward movement amount Y and the displacement amount Z of the cylinder-like body according to a moment balance principle formula, and rotating the same cylinder-like body by 120 degrees and 240 degrees on the first weighing equipment respectively to obtain the data errors of the downward movement amount Y and the displacement amount Z within 0.1-0.2 mm, wherein the data errors are stable and accurate in measurement result, good in measurement repeatability, the detection efficiency of the cylinder-like body product is improved, the subsequent cylinder-like body product can be conveniently weighed, and therefore the production efficiency of the.
The method for measuring the weight value of the cylinder-like body by utilizing the fulcrum weighing of the second weighing equipment is used for measuring the weight value of the cylinder-like body, and the gravity center distance X of the cylinder-like body is calculated.
Drawings
Fig. 1 is a schematic view of the overall structure of the first weighing apparatus of the present invention.
FIG. 2 is a schematic view of the first balance weight apparatus of the present invention without a support plate.
FIG. 3 is a schematic diagram of a first weighing apparatus loaded with a cylinder-like body according to the present invention.
Fig. 4 is an enlarged view of a portion a in fig. 2.
Fig. 5 is a plan view of the testing principle of the first weighing apparatus of the present invention.
Fig. 6 is a schematic view of the overall structure of the second weighing apparatus according to the present invention.
FIG. 7 is a schematic diagram of a second weighing apparatus loaded with a cylinder-like body according to the present invention.
Fig. 8 is a plan view of the testing principle of the second weighing apparatus of the present invention.
The weighing device comprises a first weighing device, a first base, a first supporting multi-sensor, a first fixing plate, a first supporting seat, a first tip, a first round hole table, a first steel ball, a first supporting plate, a first display meter, a second weighing device, a second base, a reinforcing strip, a second supporting multi-sensor, a second fixing plate, a second supporting plate, a positioning plate, a second display meter, a connecting device, a threaded hole 291, a threaded hole 292 connecting piece and a type 3 cylinder 29.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
A cylinder-like weighing apparatus comprising a first weighing apparatus 1 and a second weighing apparatus 2, wherein:
as shown in fig. 1 to 4, the first weighing apparatus 1 includes a first base 11 placed on a reference platform, a plurality of first support multiple sensors 12 are disposed at an edge of an upper surface of the first base 11, a first fixing plate 13 is disposed on the first support multiple sensors 12, a support 14 is fixed on the first fixing plate 13, a tip 15 is disposed above the support 14, a steel ball 17 is disposed in a circular hole table 16 above the tip 15, and a first support plate 18 is supported on the steel ball 17.
The first toli multi-sensor 12 is uniformly distributed at the upper edge of the first base 11, and the first toli multi-sensor 12 is connected with a first display meter 19.
The support 14 is connected with the tip 15 through threads.
The lower surface of the first supporting plate 18 is provided with positioning holes which are uniformly distributed and are in butt joint with the steel balls 17, and the positioning holes are counter bores of 90 degrees.
The first fixing plate 13 is fixed to the support 14 by a screw, a washer and a spring washer.
As shown in fig. 6 to 7, the second weighing apparatus 2 includes a second base 21 placed on the reference platform, the lower surfaces of two short sides of the second base 21 are symmetrically provided with reinforcing bars 22, the upper surfaces of two long sides of the second base 21 are symmetrically provided with second tollgate sensors 23, the second tollgate sensors 23 are provided with second fixing plates 24, support plates 25 are fixed on the second fixing plates 24, the support plates 25 are vertically connected to second support plates 26, and a positioning plate 27 is disposed outside one of the second support plates 26.
A second display table 28 is connected to the second toli multi-sensor 23.
The inner sides of the second supporting plates 26 are provided with mounting holes, and the connecting devices 29 are mounted between the two symmetrically arranged second supporting plates 26 through the mounting holes.
Both ends of the bottom of the second support plate 26 connected to the positioning plate 27 are provided with screw holes 291, and the height of the second support plate 26 is adjustable by means of screws.
The upper part of the second supporting plate 26 is in an arc-shaped knife-edge shape.
The positioning plate 27 is mounted on the second supporting plate 26 through a connecting member 292, and the positioning plate 27 is perpendicular to the supporting plate 25, is higher than the second supporting plate 26, and is in a narrow and long strip shape.
Examples
The method comprises the steps of leveling by using a reference platform, placing a first weighing device 1 on the reference platform, removing peels of three first supporting multiple sensors 12 and setting zero, placing a cylinder 3 to be measured on a first supporting plate 18 of the first weighing device 1, and enabling a steel ball 17 to automatically align a positioning hole in the first supporting plate 18 through small-range movement of the steel ball 17 in a circular table hole 16 of a tip 15.
The method comprises the steps of using a reference platform as a detection reference, using a tip 15 as a fulcrum, using three dial indicators to detect the bottom end surface of a similar cylinder 3 above each fulcrum, adjusting the horizontal height of the bottom end surface of the similar cylinder 3 by vertically adjusting the tip 15, keeping the bottom end surface of the similar cylinder 3 horizontal with the reference platform, reading a weight value on a first display meter 19 when the difference between every two data on the three dial indicators is not more than 0.01mm, and calculating the downward movement y and the displacement z of the similar cylinder 3 according to a moment balance principle formula.
As shown in fig. 5, the downward displacement y of the cylinder-like body 3 is calculated according to the moment balance principle formula 1.
From formula 1:
the displacement z of the cylinder-like body 3 is calculated according to the moment balance principle formula 2.
(Gya-Ia)z+(Gyb-Ib)(R*cos(30)+z)＝(Gyc-Ic)(R*cos(30)-z)
From formula 2, one can obtain:
wherein Gya, Gyb and Gyc in the formulas 1 and 2 are weight values on the three first display tables 19, respectively. A circle is made by three pivot points, R is the radius of the circle, and the length is 257.5. Ia is one third of the weight of the first support plate 18, and Ia Ib Ic.
Make level with the benchmark platform, place second weighing apparatus 2 on the benchmark platform, respectively to each two second support li multisensor 23 peel and zero, install connecting device 29 between two second backup pad 26, use two second backup pad 26 as the fulcrum, place the class cylinder 3 level that needs the measurement on two second backup pad 26, adjust the height of the second backup pad 26 that is connecting locating plate 27, make class cylinder 3 the central axis keep the level with the benchmark platform, remove connecting device 29, read the weight value on the second display list 28, and calculate the focus distance X of class cylinder 3 through this numerical value.
As shown in fig. 7, the center of gravity x of the cylinder-like body 3 is measured, and the cylinder-like body 3 cannot be placed beyond the positioning plate 27.
As shown in fig. 8, the calculation formula of the barycentric distance X of the cylinder-like body 3 is formula 3.
Wherein Gxa and Gxb in formula 3 are weight values of the two second display tables 28, 374.5 is the distance between the two second support plates 26, and 25.75 is the distance between the second support plate 26 connected to the positioning plate 27 and the positioning plate 27.
The reference platform is made of a zero-level flat plate, and the levelness of the reference platform is guaranteed not to exceed 0.04 mm.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A cylinder-like weighing apparatus comprising a first weighing apparatus (1) and a second weighing apparatus (2), wherein:
the first weighing equipment (1) comprises a first base (11) placed on a reference platform, a plurality of first supporting sensors (12) are arranged at the edge of the upper surface of the first base (11), a first fixing plate (13) is arranged on the first supporting sensors (12), a support (14) is fixed on the first fixing plate (13), a tip (15) is arranged above the support (14), a steel ball (17) is placed in a circular hole table (16) above the tip (15), and a first support plate (18) is supported on the steel ball (17);
the second weighing equipment (2) comprises a second base (21) placed on the reference platform, reinforcing strips (22) are symmetrically arranged on the lower surfaces of two short sides of the second base (21), second support multi-sensors (23) are symmetrically arranged on the upper surfaces of two long sides of the second base (21), a second fixing plate (24) is arranged on the second support multi-sensors (23), a support plate (25) is fixed on the second fixing plate (24), a second support plate (26) is perpendicularly connected to the support plate (25), and a positioning plate (27) is arranged on the outer side of the second support plate (26).
2. A cylinder-like weighing apparatus according to claim 1, wherein the first toli multi-sensors (12) are uniformly distributed at the upper edge of the first base (11), and a first display (19) is connected to the first toli multi-sensors (12); the support (14) is connected with the tip (15) through threads.
3. The cylinder-like weighing apparatus of claim 1, wherein the lower surface of the first support plate (18) is provided with positioning holes uniformly distributed and butted with the steel balls (17), and the positioning holes are counter-bored holes of 90 degrees.
4. A cylinder-like weighing apparatus according to claim 1, wherein a second display (28) is connected to said second toli-multi sensor (23); mounting holes are formed in the inner sides of the second supporting plates (26), and connecting devices (29) are mounted between the two symmetrically-arranged second supporting plates (26) through the mounting holes; and threaded holes (291) are formed in two ends of the bottom of a second supporting plate (26) connected with the positioning plate (27), and the height of the second supporting plate (26) can be adjusted through screws.
5. The cylinder-like weighing apparatus of claim 4, wherein the positioning plate (27) is mounted on the second supporting plate (26) through a connecting member (292), and the positioning plate (27) is perpendicular to the supporting plate (25) and higher than the second supporting plate (26) and has a narrow and long strip shape; the upper part of the second supporting plate (26) is in an arc-shaped knife-edge shape.
6. A cylinder-like weighing method according to any one of claims 1 to 4, comprising the determination of the amount of downshifting y and the amount of displacement z of the cylinder-like body (3), and the determination of the distance x of the center of gravity of the cylinder-like body (3), characterized in that:
the determination steps of the downward shift amount y and the displacement amount z of the cylinder-like body (3) are as follows:
leveling by using a reference platform, placing a first weighing device (1) on the reference platform, peeling and zeroing a first support multisensor (12), placing a cylinder (3) to be measured on a first supporting plate (18) of the first weighing device (1), and enabling a steel ball (17) to automatically align a positioning hole in the first supporting plate (18) through small-range movement of the steel ball (17) in a circular table hole (16) of a tip (15);
the method comprises the steps of using a reference platform as a detection reference, using a tip (15) as a fulcrum, using a plurality of dial indicators to detect the bottom end face of a similar cylinder (3) above each fulcrum, adjusting the horizontal height of the bottom end face of the similar cylinder (3) by vertically adjusting the tip (15), enabling the bottom end face of the similar cylinder (3) to be horizontal with the reference platform, reading a weight value on a first display table (19) when the difference between every two data on each dial indicator is not more than 0.01mm, and calculating the downward movement amount y and the displacement amount z of the similar cylinder (3) according to a moment balance principle formula.
The determination step of the gravity center distance x of the cylinder-like body (3) comprises the following steps:
the reference platform is used for leveling, the second weighing equipment (2) is placed on the reference platform, each second support multiple sensor (23) is peeled and zero-set respectively, the connecting device (29) is installed between the two second supporting plates (26), the two second supporting plates (26) are used as fulcrums, the similar cylinder (3) needing to be measured is horizontally placed on the two second supporting plates (26), the height of the second supporting plate (26) connected with the positioning plate (27) is adjusted, the central axis of the similar cylinder (3) is kept horizontal with the reference platform, the connecting device (29) is removed, the weight value on the second display table (28) is read, and the gravity center distance X of the similar cylinder (3) is calculated through the value.
7. The cylinder-like weighing method according to claim 6, wherein when three first toli-multi sensors (12) are fixed at the upper edge of the first base (11), the downward displacement y of the cylinder-like body (3) is calculated according to the moment balance principle formula 1;
formula 1
From formula 1:
the displacement z of the cylinder-like body (3) is calculated according to the moment balance principle formula 2;
formula 2
(Gya-Ia)z+(Gyb-Ib)(R*cos(30)+z)＝(Gyc-Ic)(R*cos(30)-z)
From formula 2, one can obtain:
wherein Gya, Gyb and Gyc in the formulas 1 and 2 are weight values on the three first display tables (19), respectively; making a circle by using the three supporting points, wherein R is the radius of the circle and the length is 257.5; ia is one third of the weight of the first supporting plate (18), and Ia is Ib is Ic.
8. A cylinder-like weighing method according to claim 6, wherein the barycentric distance X of the cylinder-like body (3) is calculated by equation 3;
formula 3
Wherein Gxa and Gxb in the formula 3 are respectively the weight values on the two second display tables (28), 374.5 is the distance between the two second support plates (26), and 25.75 is the distance between the second support plate (26) connected with the positioning plate (27) and the positioning plate (27).
9. A cylinder-like weighing method according to claim 6, characterized in that the cylinder-like body (3) is placed such that the positioning plate (27) cannot be exceeded during the measurement of the distance x from the centre of gravity of the cylinder-like body (3).
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Application publication date: 20210514 |