CN109774228B - Method for measuring tonnage of press - Google Patents
Method for measuring tonnage of press Download PDFInfo
- Publication number
- CN109774228B CN109774228B CN201910083745.1A CN201910083745A CN109774228B CN 109774228 B CN109774228 B CN 109774228B CN 201910083745 A CN201910083745 A CN 201910083745A CN 109774228 B CN109774228 B CN 109774228B
- Authority
- CN
- China
- Prior art keywords
- press
- height
- die
- press machine
- mcu
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Presses (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
The invention discloses a method for measuring the tonnage of a press machine, belongs to the technical field of measurement and control of press machines, and solves the problems of low standard of standard allocation, unfriendly user experience and high comprehensive function allocation cost of the traditional press machine. The method mainly comprises an acceleration sensor designed in a die height display device, and the operation step of converting the tonnage of the press machine through the acceleration sensor. According to the invention, an additional tonnage instrument is not required to be configured, the equipment configuration cost is greatly reduced, and each press machine has the die height display and tonnage display functions at low cost; the invention can become the standard of each press, and has innovation significance in the technical field of press measurement and control and the technical field of press mechanical equipment.
Description
Technical Field
The invention belongs to the technical field of measurement and control of a press machine, and particularly relates to a press machine tonnage measuring method which has the functions of measuring the height of a die and the tonnage of the press machine, greatly reduces the configuration cost of the press machine and has innovation significance in the field.
Background
The mold height display device is one measuring instrument for measuring and displaying the mold height of press and includes mainly mechanical mold height display device and electronic mold height display device.
The mechanical mode height display counter mainly comprises a shell, a mechanical rotating shaft, a gear and a proximity switch. The mechanical rotating shaft rotates along with the up-and-down movement of the press slide block, so that the mechanical gear is driven to rotate, the number on the gear displays the current mold height value in real time, and when the mold height reaches a set upper limit value, the corresponding proximity switch acts, and the press slide block can not move upwards any more; when the height of the die reaches a set lower limit value, the corresponding proximity switch acts, and the press slide cannot move downwards any more.
The application publication number is CN103837114A, the application publication date is 2014.06.04, and the invention creates a Chinese patent named as a height indicator of a press machine die, and discloses an electronic die height display counter for measuring the height of the press machine die based on an angle sensor. The invention discloses an electronic die height display device for measuring the height of a press machine die based on a Hall sensor, which is a Chinese patent with the application publication number of CN104215167A, the application publication number of 2014.12.17 and the invention creation name of the electronic die height display device. The electronic type die height display counter needs to calculate the die height through the MCU, and needs to display the die height through the display circuit unit, so that the MCU and the display circuit unit are indispensable circuit modules of the electronic type die height display counter.
The press before the operation staff need utilize mould height to show the counter to adjust the mould height according to the processing work piece of difference, and the mould height that the adjustment was back shows the high numerical value of mould after can showing the adjustment always, also is that the press is in-process of normally working, and mould height shows the counter and is showing the high numerical value of mould that the adjustment is good always, and the data information that shows the counter transmission this moment is little to the staff guiding meaning.
In addition to the die height readout, another important measurement instrument of the press is the tonometer. The tonnage instrument has the main function of monitoring and displaying the actual striking force generated by the press machine in the working process in real time. As known, all presses are provided with a die height display, but not every press is provided with a tonnage instrument, and particularly, customers cannot configure the tonnage instrument when selecting and purchasing small and medium-sized presses because the purchasing cost of additionally configuring equipment of the tonnage instrument is too high. For a small and medium-sized press machine which is not provided with a tonnage instrument, the real value of the striking force of the press machine during actual operation cannot be clearly known in the working process of the press machine, and when technicians arrange the plate stamping process or calculate the striking force required by a stamping finished product during the working of the press machine so as to design a continuous die, the error is usually calculated according to the nameplate value of the press machine and by experience, so that the error is large. In addition, when the die edge is damaged, the fact that the die edge is damaged cannot be immediately known, and the quality of a stamped finished product is poor when the die edge is continuously operated; without a tonometer, the die edge may be lost due to excessive punching force.
Disclosure of Invention
The invention aims to provide a method for measuring the tonnage of a press, which has the functions of measuring the height of a die and the tonnage of the press, greatly reduces the configuration cost of the press and has innovation significance in the field, aiming at the defects in the prior art.
The invention is realized by the following technical scheme:
a method for measuring the tonnage of a press comprises the following operation steps:
a. the signal input end of the MCU of the modulus height display counter is connected with an acceleration sensor through an electric signal;
b. b, mounting the die height display device provided with the acceleration sensor in the step a on a slide block of a press machine;
c. the acceleration sensor senses an acceleration signal of the press slide block in the step b and transmits the acceleration signal to the MCU unit of the die height display counter;
d. the MCU in the step c calculates the actual hitting force of the press machine in the working process according to the input acceleration signal;
e. and d, displaying the calculated striking force data on a display circuit unit in real time by the MCU in the step d.
Preferably, the die height display is an electronic die height display, and the die height measurement and the press hitting force measurement share one MCU.
Preferably, the display circuit unit is a display circuit unit of an electronic die height display device for displaying the die height.
Preferably, the display circuit unit is a display screen of the press console, and the MCU transmits the hitting power data to the press console through the communication interface unit.
Preferably, the mode height display device is a mechanical mode height display device, and a power supply unit for supplying power to the MCU is further arranged in the shell of the mode height display device.
Preferably, the display circuit unit is a nixie tube display circuit unit arranged on the mechanical mode height display device.
Preferably, the display circuit unit is a display screen of the press console, and the MCU transmits the hitting power data to the press console through the communication interface unit.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the functions of measuring the impact force of the press and measuring the die height of the press are integrated into the die height display, so that a tonnage instrument is not required to be additionally configured, the equipment configuration cost is greatly reduced, and each press has the die height display and tonnage display functions at low cost; the invention can become the standard matching of each press, and has innovation significance in the technical field of press measurement and control and the technical field of press mechanical equipment;
2. the invention has obvious beneficial effects on the electronic die height display device, and the electronic die height display device is required to be provided with an MCU (microprogrammed control unit) unit and a display circuit unit as required for measuring the die height, and the two circuit units can be completely shared with the measurement of the striking force of the press; the die height display device only needs to adjust the die height for a new workpiece before the new workpiece is punched for the first time, and the die height does not need to be displayed all the time in the working process of the press machine after the adjustment is finished; the display of the striking force of the press machine is just opposite, and the current striking force data just needs to be displayed in the working process; therefore, the impact force of the press machine can be measured completely by sharing the same MCU unit and the same display circuit unit with the measurement die height, the die height is measured when the die height needs to be measured, the impact force is measured when the impact force needs to be measured, the measurement is just complementary, and no conflict exists; from the hardware perspective, the cost of an acceleration sensor is basically increased, the fact that each press has two functions of die height measurement and impact force measurement is achieved at a very low price, and the breakthrough of standard matching greatly promotes the development of the press industry in China.
Drawings
FIG. 1 is a first schematic diagram of the motion of the present invention;
fig. 2 is a movement diagram of the invention II.
In the figure: r refers to the crankshaft radius of the press; l indicates the length of the connecting rod of the press; s is the distance from the bottom end of the sliding block to the bottom dead center; h1 refers to the minimum die height; h2 refers to the maximum die height; m indicates the slide block of the press; t refers to the press workbench.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
a method for measuring the tonnage of a press comprises the following operation steps:
a. the signal input end of the MCU of the modulus height display counter is connected with an acceleration sensor through an electric signal;
b. b, mounting the die height display device provided with the acceleration sensor in the step a on a slide block of a press machine;
c. the acceleration sensor senses an acceleration signal of the press slide block in the step b and transmits the acceleration signal to the MCU unit of the die height display counter;
d. the MCU in the step c calculates the actual hitting force of the press machine in the working process according to the input acceleration signal;
e. and d, displaying the calculated striking force data on a display circuit unit in real time by the MCU in the step d.
Preferably, the die height display is an electronic die height display, and the die height measurement and the press hitting force measurement share one MCU.
Preferably, the display circuit unit is a display circuit unit of an electronic die height display device for displaying the die height.
Preferably, the display circuit unit is a display screen of the press console, and the MCU transmits the hitting power data to the press console through the communication interface unit.
Preferably, the mode height display device is a mechanical mode height display device, and a power supply unit for supplying power to the MCU is further arranged in the shell of the mode height display device.
Preferably, the display circuit unit is a nixie tube display circuit unit arranged on the mechanical mode height display device.
Preferably, the display circuit unit is a display screen of the press console, and the MCU transmits the hitting power data to the press console through the communication interface unit.
Example 1:
the measurement method of the embodiment comprises the following operation steps:
a. the signal input end of the MCU of the modulus height display counter is connected with an acceleration sensor through an electric signal;
b. b, mounting the die height display device provided with the acceleration sensor in the step a on a slide block of a press machine;
c. the acceleration sensor senses an acceleration signal of the press slide block in the step b and transmits the acceleration signal to the MCU unit of the die height display counter;
d. the MCU in the step c calculates the actual hitting force of the press machine in the working process according to the input acceleration signal;
e. and d, displaying the calculated striking force data on a display circuit unit in real time by the MCU in the step d.
The embodiment comprises a die height display device, wherein the die height display device is provided with an MCU (microprogrammed control unit), and the signal input end of the MCU is electrically connected with an acceleration sensor; the acceleration sensor is used for sensing an acceleration signal of the press slide and transmitting the acceleration signal to the MCU; the MCU microcontroller unit converts the hitting power of the press according to the input acceleration signal, and the hitting power data is displayed by the display circuit unit. The mould height of this embodiment shows the counter for electronic type mould height, because of need measure the mould height, can design MCU microcontroller unit and display circuit unit in the electronic type mould height shows the counter itself, this embodiment also need use MCU microcontroller unit and display circuit unit when measuring the press striking force, and these two units can be completely with the MCU microcontroller unit in the former electronic type mould height shows the counter, display circuit unit sharing, the display circuit unit that this embodiment striking force data that also is, the display circuit unit of this embodiment striking force data shows the display circuit unit of mould height for electronic type mould height shows the counter, it is exactly the MCU microcontroller unit of measuring the press striking force to measure mould height MCU microcontroller unit. The die height display device only needs to adjust the die height for a new workpiece before the new workpiece is punched for the first time, and the die height does not need to be displayed all the time in the working process of the press machine after the adjustment is finished; the display of the striking force of the press machine is just opposite, and the current striking force data just needs to be displayed in the working process; therefore, the impact force of the press machine can be measured completely by sharing the same MCU unit and the same display circuit unit with the measurement die height, the die height is measured when the die height needs to be measured, the impact force is measured when the impact force needs to be measured, the measurement is just complementary, and no conflict exists; from the hardware perspective, the cost of an acceleration sensor is basically increased, and the fact that each press machine has two functions of die height measurement and striking force measurement is achieved at a very low price. That is, the embodiment changes the standard of the traditional press from the single measurement of the die height, and has two functions of the die height measurement and the impact force measurement, and the breakthrough of the standard greatly promotes the development of the press industry in China.
Description of the drawings fig. 1 to 2 are diagrammatic views of a press movement, in which R represents the radius of the press crankshaft; l represents the length of the connecting rod of the press; s represents the distance from the bottom end of the sliding block to the bottom dead center; h1 represents the minimum die height of the press; h2 represents the maximum die height of the press; m represents a press slide; t represents a press workbench. The die-filling height of the press is adjusted by the die-filling height adjusting device of the press, which is generally equivalent to the length L of the adjusting connecting rod. The mold height display device displays the current mold height.
And (3) combining a motion diagram of the press machine, and analyzing the conversion relation between the slide block acceleration and the press machine striking force as follows:
according to newton's second law, the force exerted by the movement of the slider M can be described as:
because the slide block is a constrained body and can only move in the vertical direction, the description can be simplified as follows: fX＝max(ii) a Wherein, FXRefers to the resultant force of the slider M in the x-direction, M refers to the combined mass of the slider assembly, axRefers to the acceleration of the slider in the x-direction.
When the press is in operation, FXThe method is divided into two parts: fx＝FQ+FD＝max(ii) a Wherein FDThe striking force when the slider M strikes. FQOther resultant forces in the x direction.
Therefore, the method comprises the following steps: fQ+FD＝max；
FD＝max-FQ； (1)
Measuring the striking force of the press by using a load meter, adjusting the height of the die to carry out secondary measurement, and respectively obtaining B1、B2Two constants, with the invention acceleration values a1 and a2, and B1B2, a1, a2 solve the formula (1):
B1＝ma1-FQ； (2)
B2＝ma2-FQ； (3)
solving the steps (2) and (3) to obtain:
the relationship between the slide acceleration and the press striking force can thus be found to be:
for the adjustable speed press, due to various factors of mechanical design, when the press operates at variable speed, the load force of the system is not completely linear, so if the press is operated at variable speed, the formula (4) needs to be corrected.
The specific correction method comprises the following steps: the operation speed of the press, that is, the angular speed ω of the crankshaft, may be obtained by various methods, for example, the measurement is performed according to the acceleration variation characteristic of the press itself, or the angular signal of the electronic cam on the crankshaft of the press is used, or the speed or frequency signal of the motor frequency converter may be directly read to obtain the corresponding speed signal of the press, and so on.
Get omega0For the highest speed of the press to start
Reduce equation (4) to
FD＝max-FQ＝K1a-K2 (5)。
ω0Corresponds to K10And K20，
ω1Corresponds to K11And K21，
……
ωnCorresponds to K1nAnd K2n；
Performing curve fitting on the data, and adopting an n-order polynomial K1＝dnωn+…+d2ω2+d1ω+d0Forms thereof;
for the measurement of the striking force of the press, the calculation precision can be generally ensured by taking the third order,
thus, K1＝d3ω3+d2ω2+d1ω+d0Wherein d is3、d2、d1、d0Is a polynomial constant;
in the same way, K2＝g3ω3+g2ω2+g1ω+g0Wherein g is3、g2、g1、g0Is a polynomial constant;
substituting the above into formula (5) to obtain the relationship between the acceleration of the variable speed press and the striking force of the press as follows:
FD＝(d3ω3+d2ω2+d1ω+d0)a-(g3ω3+g2ω2+g1ω+g0)。
example 2:
on the basis of embodiment 1, the striking force data display circuit unit of this embodiment may also be a display screen of the press console, and the MCU microcontroller unit transmits the striking force data to the press console through the communication interface unit. That is, the striking force data can be displayed by a display circuit unit of the electronic die height display counter for displaying the die height, and also can be displayed by a display screen of a press console, and the striking force data and the electronic die height display counter can be displayed independently and simultaneously.
Example 3:
the measurement method of the embodiment comprises the following operation steps:
a. the signal input end of the MCU of the modulus height display counter is connected with an acceleration sensor through an electric signal;
b. b, mounting the die height display device provided with the acceleration sensor in the step a on a slide block of a press machine;
c. the acceleration sensor senses an acceleration signal of the press slide block in the step b and transmits the acceleration signal to the MCU unit of the die height display counter;
d. the MCU in the step c calculates the actual hitting force of the press machine in the working process according to the input acceleration signal;
e. and d, displaying the calculated striking force data on a display circuit unit in real time by the MCU in the step d.
The embodiment comprises a die height display device, wherein the die height display device is provided with an MCU (microprogrammed control unit), and the signal input end of the MCU is electrically connected with an acceleration sensor; the acceleration sensor is used for sensing an acceleration signal of the press slide and transmitting the acceleration signal to the MCU; the MCU microcontroller unit converts the hitting power of the press according to the input acceleration signal, and the hitting power data is displayed by the display circuit unit. The high-speed counter of mould of this embodiment is the high-speed counter of mechanical type mould, still is equipped with the power supply unit who provides the power for MCU microcontroller unit in its casing. The display circuit unit of the embodiment is arranged on the shell of the mechanical type mode height display device, and a nixie tube type display circuit unit is generally selected. In the embodiment, the functions of measuring the impact force of the press and the die height of the press are integrated into the mechanical die height display, a tonnage instrument does not need to be additionally configured, the equipment configuration cost is greatly reduced, and each press has the die height display and tonnage display functions at low cost; the embodiment can become the standard configuration of each press machine, and has innovation significance in the technical field of press machine measurement and control and the technical field of press machine mechanical equipment. The conversion relationship between the slide acceleration and the striking force of the press in this embodiment is the same as that in embodiment 1, and will not be described again.
Example 4:
on the basis of embodiment 3, the striking force data display circuit unit of this embodiment may also be a display screen of the press console, and the MCU microcontroller unit transmits the striking force data to the press console through the communication interface unit. That is, the hitting power data can be displayed through a nixie tube display circuit unit arranged on the mechanical die height display counter, and also can be displayed through a display screen of a control console of the press machine, and the hitting power data and the nixie tube display circuit unit can be displayed independently or simultaneously.
In summary, the present invention is only a preferred embodiment, and not intended to limit the scope of the invention, and all equivalent changes and modifications in the shape, structure, characteristics and spirit of the present invention described in the claims should be included in the scope of the present invention.
Claims (1)
1. A method for measuring the tonnage of a press is characterized by comprising the following operation steps:
a. the signal input end of the MCU of the modulus height display counter is connected with an acceleration sensor through an electric signal;
b. b, mounting the die height display device provided with the acceleration sensor in the step a on a slide block of a press machine;
c. the acceleration sensor senses an acceleration signal of the press slide block in the step b and transmits the acceleration signal to the MCU unit of the die height display counter; the die height display device is an electronic die height display device, and the die height measurement device and the press striking force measurement device share one MCU (micro control unit);
d. the MCU in the step c calculates the actual hitting force of the press machine in the working process according to the input acceleration signal;
e. d, the MCU displays the calculated hitting power data on a display unit in real time; the display unit is a display unit for displaying the height of the die by an electronic die height display counter;
the method for measuring the impact force of the press machine through the acceleration of the slide block comprises the following steps:
measuring the striking force of the press by using a load meter, adjusting the height of the die to carry out secondary measurement, and respectively obtaining B1、B2Two constants, and acceleration value a is obtained by using acceleration sensor1And a2；
Acceleration a of slide block and impact force F of pressDThe relationship between them is:
；
for the press machine with adjustable speed, firstly measuring the crankshaft angular speed omega of the press machine, and carrying out curve fitting on the measured omega data to obtain the slide block acceleration a and the press machine impact force F of the variable speed press machineDThe relationship between them is:
(ii) a Wherein d is3、d2、d1、d0Is a polynomial constant, g3、g2、g1、g0And omega is the angular velocity of the crankshaft of the press, which is a polynomial constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910083745.1A CN109774228B (en) | 2019-01-29 | 2019-01-29 | Method for measuring tonnage of press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910083745.1A CN109774228B (en) | 2019-01-29 | 2019-01-29 | Method for measuring tonnage of press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109774228A CN109774228A (en) | 2019-05-21 |
| CN109774228B true CN109774228B (en) | 2021-05-18 |
Family
ID=66502814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910083745.1A Active CN109774228B (en) | 2019-01-29 | 2019-01-29 | Method for measuring tonnage of press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109774228B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837114A (en) * | 2013-12-31 | 2014-06-04 | 扬州大祺自动化技术有限公司 | Press machine die height indicator |
| CN206523647U (en) * | 2017-03-06 | 2017-09-26 | 佛山市科德林自动化精密测控科技有限公司 | A kind of intelligent device for measuring of automated machine motion state |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499461A (en) * | 2016-01-25 | 2016-04-20 | 安阳锻压机械工业有限公司 | Device for numerically controlling position of hammer and detecting impact energy in severe environments |
| CN105729851B (en) * | 2016-02-24 | 2017-12-05 | 上海工程技术大学 | A kind of electric screw press intelligent observing and controlling system |
| CN205551354U (en) * | 2016-03-10 | 2016-09-07 | 上海运良锻压机床有限公司 | PLC controlling means of press |
| CN107175307B (en) * | 2016-03-10 | 2020-09-08 | 上海工程技术大学 | Real-time displacement measuring and controlling device of screw press |
-
2019
- 2019-01-29 CN CN201910083745.1A patent/CN109774228B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837114A (en) * | 2013-12-31 | 2014-06-04 | 扬州大祺自动化技术有限公司 | Press machine die height indicator |
| CN206523647U (en) * | 2017-03-06 | 2017-09-26 | 佛山市科德林自动化精密测控科技有限公司 | A kind of intelligent device for measuring of automated machine motion state |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109774228A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5721388B2 (en) | Servo press control device and control method, and servo press equipped with this control device | |
| CN109774228B (en) | Method for measuring tonnage of press | |
| CN201365492Y (en) | Soft ice cream machine with on-line rotational speed detection type control | |
| CN203955769U (en) | Height of packing compact display | |
| CN2694226Y (en) | High-precision flatness measuring instrument | |
| CN209971655U (en) | Press tonnage monitoring device | |
| CN103042670A (en) | Automatic data sampling system of elbow injection molding machine | |
| CN104132623B (en) | Tool for measuring shrinkage rate of plastic part | |
| CN214951224U (en) | Stay-supported displacement sensor | |
| CN205496390U (en) | Automatic stamping die | |
| CN210837293U (en) | Multifunctional compression device for bonding braided wire for automobile | |
| CN201181299Y (en) | Magnetoelectricity type externally hung torque-measuring apparatus | |
| CN204480007U (en) | A kind of fully-automatic intelligent servicing unit | |
| CN103384100A (en) | Digital belt driving module | |
| CN106092551B (en) | A kind of feel test module and hand feeling testing device and feel test method based on voice coil motor and force snesor | |
| CN210400807U (en) | Combined hardware testing device | |
| KR20140001463A (en) | Apparatus for measuring accuracy in pressing device | |
| CN105737960A (en) | Joint weighing device of a plurality of weighing devices | |
| CN108856354A (en) | A kind of lathe stamping counting device | |
| CN202088492U (en) | Six-bar servo press machine with triangular swing link | |
| CN207445053U (en) | orthodontic precise electronic torque meter | |
| CN214669134U (en) | Speed measuring device for feeding belt weigher | |
| CN100462676C (en) | Piston integrated measurement system | |
| CN101639343A (en) | Height indicator and data exchange method thereof | |
| CN217191970U (en) | Hydraulic punching device for aluminum template |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |