CN111307213A - Method for detecting projectile throwing force, angle and speed of shot blasting machine - Google Patents
Method for detecting projectile throwing force, angle and speed of shot blasting machine Download PDFInfo
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- CN111307213A CN111307213A CN202010152189.1A CN202010152189A CN111307213A CN 111307213 A CN111307213 A CN 111307213A CN 202010152189 A CN202010152189 A CN 202010152189A CN 111307213 A CN111307213 A CN 111307213A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a method for detecting the projectile throwing strength, angle and speed of a shot blasting machine, which comprises the following steps: s1: the pressure sensor collects the impact force generated by the impact of the projectile on the plane plate of the weighing body; s2: the collected impact force value is subjected to a program judgment filtering algorithm, and the impact force value exceeding a normal threshold value is screened out; s3: and carrying out average filtering processing on the residual impact force data to obtain the impact force of the shot.
Description
Technical Field
The invention belongs to the technical field of shot blasting machine detection equipment, and particularly relates to a method for detecting the projectile throwing strength, angle and speed of shot of a shot blasting machine.
Background
The shot blasting machine is a mechanical device which throws out shot and sand by utilizing an impeller rotating at a high speed, and impacts the surface of a part at a high speed to meet the requirement of surface treatment. The wear resistance, corrosion resistance and beauty of the treated shot and sand metal are improved, and the adhesive force and uniformity of spraying are enhanced. Different metal workpiece treatment standards are different, so that parameters such as the throwing strength, the spraying angle, the throwing speed, the throwing time and the like of different shot blasting machines and different shots are required to be obtained, and high-efficiency throwing is realized. The projectile throwing angle and speed are important parameters for throwing and spraying effects. Therefore, it is very important to obtain the throwing angles and speeds of the shot blasting machine at different rotating speeds and under different shots.
At present, no equipment and method for measuring the casting angle and speed in the shot blasting machine industry at home and abroad exist. The shot blasting machine throwing force is measured mainly in two forms: 1. almen test piece-Almen measuring instrument of American EI and American HOPE brand products. The principle of the measuring instrument is as follows: the impact of the high-speed moving projectile flow on the metal surface is utilized to generate a cyclic plastic strain layer on the surface, thereby causing favorable change of the microstructure of the layer and leading the surface layer to introduce a residual compressive stress field. The Almen test piece is a standard sample block for expressing shot blasting effect, is made of SAE1070 spring steel, and can generate a certain radian under the action of residual stress after shot blasting is carried out on the test piece, and the arc height can be measured by using an arc height tester to convert the shot blasting strength. The method has the advantages of simplicity and reliability, but the measured data is inaccurate, the concept of shot direction is avoided, the randomness of the measurement result is high, and the method is not popularized generally; 2. measuring equipment of SINTO technology in new east japan. The measuring principle of the device is that a pressure sensor is utilized, a computer is used for collecting pressure signals of the sensor in real time, certain data are obtained, and then the pressure signals are analyzed to obtain the throwing power. The measured data of the measuring device has a lot of uncertainty, and the measured data is extremely inaccurate and only serves as a concept for researching projectile throwing force.
In view of the above, the applicant has provided a projectile projection detection device for a shot blasting machine, and applied for the invention patent with application number 2020100946042.
The concrete structure of detection device has been provided in above-mentioned patent application, and this application uses the detection device who provides in above-mentioned patent application as the basis, provides the detection method of the dynamics of throwing, angle and the speed of shot-blasting machine shot.
In the above patent application, two different technical solutions are actually provided, the first is a detection device without a camera shooting function, that is, a transverse camera shooting module and a vertical camera shooting module are not included; the second kind is for taking the detection device of the function of making a video recording, include the module of making a video recording horizontally, vertical camera module promptly.
According to the technical scheme, on the basis of the first detection device without the camera shooting function in the patent application, the detection method for the projectile throwing strength, angle and speed of the shot blasting machine is provided for the detection device.
Disclosure of Invention
The invention aims to provide a method for detecting the projectile throwing strength, angle and speed of a shot blasting machine, so as to solve the technical problems in the prior art.
In order to achieve the purpose, the invention specifically provides the following technical scheme:
a method for detecting the projectile throwing force of shot blasting machines comprises the following steps:
s1: the pressure sensor collects the impact force generated by the impact of the projectile on the plane plate of the weighing body;
s2: the collected impact force value is subjected to a program judgment filtering algorithm, and the impact force value exceeding a normal threshold value is screened out;
s3: and carrying out average filtering processing on the residual impact force data to obtain the impact force of the shot.
Preferably, in step S2, the determination of the normal threshold is based on the big data of the current impact force test; the size of normal threshold value is confirmed more accurately, improves the detection precision of the throwing power.
The program judgment filtering algorithm adopted in step S2 adopts a filtering algorithm known in the prior art, and is not described herein again.
A method for detecting a projectile throwing angle of a shot blasting machine comprises the following steps:
c1, defining the deflection angle between the projectile projection direction and the horizontal direction to be α and defining the deflection angle between the projectile projection direction and the vertical direction to be β;
c2, calculating the horizontal deflection angle α by the following formula:
α＝KXφX＝KXarccosKX(△FX/△F)＝arccosKX((F1+F3)-(F2+F4))/(F1+F2+F3+F4)
in the formula, KXIs a constant related to the rotation moving axis of the weighing plane plate and the volume of the weighing plane plate;
c3, calculating the horizontal deflection angle β by the following formula:
β＝KYφY＝KYarccosKY(△FY/△F)＝arccosKY((F1+F2)-(F3+F4))/(F1+F2+F3+F4)
in the formula, KYIs a constant related to the rotation moving axis of the body-weighing plane plate and the volume of the body-weighing plane plate.
A method for detecting the projectile throwing speed of a shot blasting machine comprises the following steps:
k1: the projectile running acceleration value is calculated by the following formula,
a＝F/m；
wherein F is a projectile throwing power value detected by a throwing power detection method, and m is the mass of the projectile;
k2: calculating a flight time value in a projectile throwing process, and specifically comprising the following steps:
when the optical fiber sensor module detects that the shot passes through the screening hole, timing is started, impact force sampling is carried out simultaneously, the running time of the shot is recorded after the impact force enters the ascending channel, and the time of subtracting the sampling period from the time is recorded as △ T;
sampling for multiple times to obtain △ T sequences, screening out time values exceeding a normal threshold value through a program judgment filtering algorithm, and carrying out average filtering processing on the remaining time values to obtain shot blasting operation time △ T;
k3: calculating the flight distance value of shot blasting, which comprises the following steps:
defining the distance between the screening sheet and the plane plate of the weighing body as h, the transverse offset distance of the projectile is as follows:
x is htan α, wherein α is the deviation angle between the projectile projection direction and the horizontal direction;
the vertical offset distance of the projectile was:
y is htan β, wherein β is the deviation angle between the projectile projection direction and the vertical direction;
the offset distance from the center line to the landing point of the plane plate of the balance body from the movement of the projectile is as follows:
z＝(x2+y2)1/2；
the flying distance of the projectile from the screening hole to the plane plate of the weighing body is as follows:
S＝(h2+z2)1/2；
acquiring a flight distance S sequence of the projectile, and screening out the flight distance exceeding a normal threshold value through a program judgment filtering algorithm; carrying out average filtering processing on the residual flying distance value to obtain the flying distance s of shot blasting;
k4: calculating a projectile casting speed value according to the following formula:
V＝(s-a△t2/2)/△t。
preferably, in the step K2, the determination of the normality threshold of the operation time is based on the big data of the current movement time; the size of the normal threshold value is more accurately determined.
Preferably, in the step K3, the determination of the normal threshold value of the flight distance is based on the big data of the current flight distance; the size of the normal threshold value is more accurately determined.
The invention has the advantages that the omnibearing rotary pressure sensor is adopted to collect pressure data, so that the accuracy and precision of the pressure data are improved; accurate data support is provided for the measurement of the casting force, angle and speed in the application; the accuracy of the final test is improved.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
Fig. 1 is an analysis diagram of a projectile projection angle.
Fig. 2 is a diagram of analysis of a trajectory of a projectile.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
Example 1:
the embodiment provides a method for detecting the projectile throwing force of shot of a shot blasting machine, which comprises the following steps:
s1: the pressure sensor collects the impact force generated by the impact of the projectile on the plane plate of the weighing body;
s2: the collected impact force value is subjected to a program judgment filtering algorithm, and the impact force value exceeding a normal threshold value is screened out;
s3: and carrying out average filtering processing on the residual impact force data to obtain the impact force of the shot.
In step S2, the determination of the normal threshold is based on the big data of the current impact force test; the size of normal threshold value is confirmed more accurately, improves the detection precision of the throwing power.
The program judgment filtering algorithm adopted in step S2 adopts a filtering algorithm known in the prior art, and is not described herein again.
Example 2:
as shown in fig. 1, the embodiment provides a method for detecting a projectile projecting angle of a shot blasting machine, which includes the following steps:
c1, defining the deflection angle between the projectile projection direction and the horizontal direction to be α and defining the deflection angle between the projectile projection direction and the vertical direction to be β;
c2, calculating the horizontal deflection angle α by the following formula:
α＝KXφX＝KXarccosKX(△FX/△F)＝arccosKX((F1+F3)-(F2+F4))/(F1+F2+F3+F4)
in the formula, KXIs a constant related to the rotation moving axis of the weighing plane plate and the volume of the weighing plane plate;
c3, calculating the horizontal deflection angle β by the following formula:
β＝KYφY＝KYarccosKY(△FY/△F)＝arccosKY((F1+F2)-(F3+F4))/(F1+F2+F3+F4)
in the formula, KYIs a constant related to the rotation moving axis of the body-weighing plane plate and the volume of the body-weighing plane plate.
Example 3:
as shown in fig. 2, the embodiment provides a method for detecting a projectile throwing speed of a shot blasting machine, which includes the following steps:
k1: the projectile running acceleration value is calculated by the following formula,
a＝F/m；
wherein F is a projectile throwing power value detected by a throwing power detection method, and m is the mass of the projectile;
k2: calculating a flight time value in a projectile throwing process, and specifically comprising the following steps:
when the optical fiber sensor module detects that the shot passes through the screening hole, timing is started, impact force sampling is carried out simultaneously, the running time of the shot is recorded after the impact force enters the ascending channel, and the time of subtracting the sampling period from the time is recorded as △ T;
sampling for multiple times to obtain △ T sequences, screening out time values exceeding a normal threshold value through a program judgment filtering algorithm, and carrying out average filtering processing on the remaining time values to obtain shot blasting operation time △ T;
k3: calculating the flight distance value of shot blasting, which comprises the following steps:
defining the distance between the screening sheet and the plane plate of the weighing body as h, the transverse offset distance of the projectile is as follows:
x is htan α, wherein α is the deviation angle between the projectile projection direction and the horizontal direction;
the vertical offset distance of the projectile was:
y is htan β, wherein β is the deviation angle between the projectile projection direction and the vertical direction;
the offset distance from the center line to the landing point of the plane plate of the balance body from the movement of the projectile is as follows:
z＝(x2+y2)1/2；
the flying distance of the projectile from the screening hole to the plane plate of the weighing body is as follows:
S＝(h2+z2)1/2；
acquiring a flight distance S sequence of the projectile, and screening out the flight distance exceeding a normal threshold value through a program judgment filtering algorithm; carrying out average filtering processing on the residual flying distance value to obtain the flying distance s of shot blasting;
k4: calculating a projectile casting speed value according to the following formula:
V＝(s-a△t2/2)/△t。
in the step K2, the determination of the normal threshold of the running time is based on the big data of the current movement time; the size of the normal threshold value is more accurately determined.
In the step K3, the determination of the normal threshold value of the flight distance is based on the big data of the current flight distance; the size of the normal threshold value is more accurately determined.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A method for detecting the projectile throwing force of shot of a shot blasting machine is characterized by comprising the following steps:
s1: the pressure sensor collects the impact force generated by the impact of the projectile on the plane plate of the weighing body;
s2: the collected impact force value is subjected to a program judgment filtering algorithm, and the impact force value exceeding a normal threshold value is screened out;
s3: and carrying out average filtering processing on the residual impact force data to obtain the impact force of the shot.
2. The method for detecting the projectile throwing power of the shot blasting machine as claimed in claim 1, wherein in the step S2, the determination of the normal threshold is based on the big data of the impact force test.
3. A method for detecting a projectile throwing angle of a shot blasting machine is characterized by comprising the following steps:
c1, defining the deflection angle between the projectile projection direction and the horizontal direction to be α and defining the deflection angle between the projectile projection direction and the vertical direction to be β;
c2, calculating the horizontal deflection angle α by the following formula:
α＝KXφX＝KXarccosKX(△FX/△F)＝arccosKX((F1+F3)-(F2+F4))/(F1+F2+F3+F4)
in the formula, KXIs a constant related to the rotation moving axis of the weighing plane plate and the volume of the weighing plane plate;
c3, calculating the horizontal deflection angle β by the following formula:
β＝KYφY＝KYarccosKY(△FY/△F)＝arccosKY((F1+F2)-(F3+F4))/(F1+F2+F3+F4)
in the formula, KYIs a constant related to the rotation moving axis of the body-weighing plane plate and the volume of the body-weighing plane plate.
4. A method for detecting the projectile throwing speed of a shot blasting machine is characterized by comprising the following steps:
k1: the projectile running acceleration value is calculated by the following formula,
a＝F/m；
wherein F is a projectile throwing power value detected by a throwing power detection method, and m is the mass of the projectile;
k2: calculating a flight time value in a projectile throwing process, and specifically comprising the following steps:
when the optical fiber sensor module detects that the shot passes through the screening hole, timing is started, impact force sampling is carried out simultaneously, the running time of the shot is recorded after the impact force enters the ascending channel, and the time of subtracting the sampling period from the time is recorded as △ T;
sampling for multiple times to obtain △ T sequences, screening out time values exceeding a normal threshold value through a program judgment filtering algorithm, and carrying out average filtering processing on the remaining time values to obtain shot blasting operation time △ T;
k3: calculating the flight distance value of shot blasting, which comprises the following steps:
defining the distance between the screening sheet and the plane plate of the weighing body as h, the transverse offset distance of the projectile is as follows:
x is htan α, wherein α is the deviation angle between the projectile projection direction and the horizontal direction;
the vertical offset distance of the projectile was:
y is htan β, wherein β is the deviation angle between the projectile projection direction and the vertical direction;
the offset distance from the center line to the landing point of the plane plate of the balance body from the movement of the projectile is as follows:
z＝(x2+y2)1/2；
the flying distance of the projectile from the screening hole to the plane plate of the weighing body is as follows:
S＝(h2+z2)1/2；
acquiring a flight distance S sequence of the projectile, and screening out the flight distance exceeding a normal threshold value through a program judgment filtering algorithm; carrying out average filtering processing on the residual flying distance value to obtain the flying distance s of shot blasting;
k4: calculating a projectile casting speed value according to the following formula:
V＝(s-a△t2/2)/△t。
5. the method for detecting the projectile throwing speed of the shot blasting machine as claimed in claim 4, wherein in the step K2, the determination of the normal threshold of the operation time is based on the big data of the current movement time.
6. The method for detecting the projectile throwing speed of the shot blasting machine as claimed in claim 5, wherein in the step K3, the determination of the normal threshold value of the flight distance is based on the big data of the flight distance.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115436651A (en) * | 2022-08-23 | 2022-12-06 | 成都飞机工业（集团）有限责任公司 | Method and system for measuring speed of projectile, electronic equipment, medium and application |
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