CN201534391U - Cam control device of high-speed press - Google Patents

Cam control device of high-speed press Download PDF

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Publication number
CN201534391U
CN201534391U CN2009200570813U CN200920057081U CN201534391U CN 201534391 U CN201534391 U CN 201534391U CN 2009200570813 U CN2009200570813 U CN 2009200570813U CN 200920057081 U CN200920057081 U CN 200920057081U CN 201534391 U CN201534391 U CN 201534391U
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China
Prior art keywords
signal
control
analog
general
press
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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.)
Expired - Lifetime
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CN2009200570813U
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Chinese (zh)
Inventor
李伟国
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Huamao Machinery (zhaoqing) Co Ltd
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Huamao Machinery (zhaoqing) Co Ltd
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Priority to CN2009200570813U priority Critical patent/CN201534391U/en
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Abstract

The utility model relates to a cam control device of a high-speed press, which comprises a press, a central processor, a control interface, a general-purpose input/output end, an analog-to-digital converter, an angle sensor, a clutch brake switch and a signal processing circuit, wherein the angle sensor acquires the angle travel from the press and transmits the corresponding analog signal, passes through the signal processing circuit to the analog signal input end of the analog-to-digital converter, the digital signal output end of the analog-to-digital converter is connected with the acquisition signal input end of the central processor though the general-purpose input/output end, the central processor controls the status of switching-on and switching-off of the clutch brake switch through the I/O port of the general-purpose input/output end, and the clutch brake enables the press to accurately stop working at appointed point. The utility model has the advantages that: since a high-precision rotary transformer is adopted, the angle sample data is more real-time and accurate; multipoint speed change and parking control can be realized, so that the utility model can be applicable to the design of the composite mould pressing which needs to be repeatedly pressed; and a general interface is adopted to simplify the mating of the external environment.

Description

A kind of high-speed blanking press cam control gear
Technical field
The utility model relates to a kind of cam control gear, relates in particular to a kind of high-speed blanking press cam control gear.
Background technology
Existing electric cam need be converted into technology corresponding complicated mathematical model to the technological process setting of forcing press, and will carry out complicated computer machine language and write work.Have only a fixed point to shut down dedicated channel, revisal is set can only realize that parameter can not be revised automatically by the concrete setup parameter of artificial input.The signal logic pattern of its output is driving pressure machine clutch and brake driving switch directly, needs to use PLC (Programmable Logic Controller) expansion.Electric cam has only one tunnel malfunction output, and the failure code classification has only 5 kinds.Existing electric cam uses rotary encoder to add detecting head and tests the speed and the fault judgement, because original rotary encoder shock resistance is low, can not be installed on the real work bent axle, skids or the axle fracture fault as if judging, needs add detecting head in active side.Input interface is few and fixed point shutdown output signal logical form is special, need connect into typical control logic circuit with extra PLC and could realize required control logic.Delivery outlet itself does not have absorption diode, makes as inductive loads such as contactors in connection to add absorption diode, otherwise will cause delivery outlet to damage easily.The interface that carries is too simple, to repeatedly push repeatedly during operation, and can only storing and setting one cover program, can not control a plurality of strokes location.
The utility model content
The utility model purpose is to provide a kind of can control the control device that the high-speed blanking press cam orientation is shut down.
The purpose of this utility model can realize by following scheme: a kind of high-speed blanking press cam control gear comprises: forcing press; It is characterized in that, also comprise: central processing unit is used for processing control signals; The control interface is used for inquiry and input of control commands; General I/O end is used for input and gathers signal and output control signal; Analog-digital converter, the analog signal conversion that is used for gathering is a data signal; Angular transducer is used to gather the stroke analog signal; The clutch and brake switch is used for shutting down according to the fixed point of switching signal controlled pressure machine; Signal processing circuit is used for converting the angular transducer signal to d. c. voltage signal; Described angular transducer is from forcing press acquisition angles stroke and export corresponding analog signal, through the input end of analog signal of signal processing circuit to analog-digital converter, the digital signal output end of analog-digital converter connects the sampled signal input of central processing unit by general I/O end; The control signal output of central processing unit is connected the control signal input of forcing press with electronic switch by general I/O end; The control interface is by the Interface Control port of data wire connection central processing unit, and central processing unit is by the state of general I/O end I/O port controlling clutch and brake switch, and clutch and brake makes forcing press at the specified point accurate stopping.
Described angular transducer adopts the high accuracy rotary transformer.The voltage analog value that produces when the rotary transformer output angle changes is that accuracy of detection or shock resistance are all strong than original photoelectric sensor, so can be installed on the work bent axle, thereby reaches the effect of real-time monitoring.
Be provided with the intelligent TU task unit of adjusting in the described central processing unit, described intelligence is adjusted the control input of TU task unit by the record controls interface, and the difference of meeting Automatic Detection and Control signal and actual slip angle is analyzed the adjustment braking characteristic.
Eight cover setting programs can be stored in described control interface, and every cover program has comprised different stroke of a press orders.
In order to increase the channel selecting possibility, described central processing unit can be selected any 2 angles and shut down control output as fixed point.
Each port of described general I/O end all is provided with optical coupling isolator.
The utility model advantage is:
1, owing to adopt the high accuracy rotary transformer, the angle sampled data more in real time accurately; 2, can realize the multiple spot speed change and the control of stopping, make in its composite coining that can be applicable to repeatedly punching press design; 3, it is supporting to adopt general-purpose interface to simplify peripheral environment.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is imput output circuit figure of the present utility model;
Fig. 3 is a multi-point signal output schematic diagram of the present utility model;
Fig. 4 is a display circuit of the present utility model;
Fig. 5 is a control flow chart of the present utility model.
The specific embodiment
As shown in Figure 1, the utility model comprises forcing press, clutch and brake switch, signal processing circuit, rotary transformer, modulus converter A/D, general I/O end I/O, central processor CPU and control interface.Rotary transformer is from forcing press acquisition angles analog signal, import central processor CPU by signal processing circuit and modulus converter A/D conversion from general I/O end I/O port, the control interface can the inquiry system state and the input program control signal to central processing unit, central processing unit is by the state of general I/O end I/O port controlling clutch and brake switch, and clutch and brake makes forcing press at the specified point accurate stopping.
Wherein central processor CPU adopts the miniature control chip of HD6475328 as core processor, and this processor is 16 bit CPUs, and has digital I/O mouth and be used for digital I/O control.Adopted the storage of 8 8K EEPROM of 58V65A as the systems soft ware data, adopted 8 8K static RAM (SRAM)s of 6264BLF10LT as Installed System Memory, CPU is by 74HC374 address latch control reading external register.Use 71055 parallel interface extended chips to carry out the I/O expansion.The 16 digit microcomputer processor has very strong data-handling capacity, can realize very complicated data analysis and intelligent calculation function.
Signal processing circuit mainly is made up of current rectifying and wave filtering circuit, three group of 4556 amplifier chip, 3024 chips.Major function is that the 3KHz sinusoidal voltage signal of rotary transformer is nursed one's health, convert to the d. c. voltage signal of the linear direct ratio of alternating voltage virtual value and export to 12 modulus converter A/D conversion chips, CPU just can access accurate rotary transformer rotation angle value by the high-speed sampling data that read on the A/D conversion chip, and obtains velocity amplitude and percentage speed variation by differentiating.
Port expansion control logic gate circuit.Main effect is the auxiliary circuit that is used for CPU numeral I/O port expansion and cpu bus control.Mainly form by D door, triple gate (one-way bus driver), ternary not gate (one-way bus driver), ternary D door (address latch), programmable gate chip.This part circuit has realized that mainly CPU internally deposits reading of program and parameter by total line traffic control, and realizes reading and controlling cam control gear I/O mouth.
Anglec of rotation sequence controller adopts high-precision rotary transformer to measure actual drive shaft speed, this rotary transformer can be under vibration environment the accurately rotation of measurement device, and output 3KHz sinusoidal voltage signal (analog signal).Analog signal is by the anti-interference filtration modulating system, guarantees that signal can be able to correct reception not disliking under the cruel electromagnetic interference environment.Anglec of rotation sequence controller carries out high-speed sampling by the high-speed a/d chip, makes controller can access real-time equipment rotation angle information.
Power supply carries out step-down by transformer to civil power, give each circuit board power supply by rectification and switching power circuit with the low-voltage DC that voltage becomes the use of appropriate circuitry plate then, and be used for the measuring-signal power supply of rotary transformer by the low-voltage ac voltage of inverter circuit generation 3KHz.
As shown in Figure 2, by using TLP521-4 optocoupler (solid-state relay type) to come general I/O end I/O is isolated, because the output current of TLP521-4 optocoupler can only reach 50mA, therefore need to increase TD62084AFC (darlington circuit) and drive the driving force that chip improves output port, each output port of TD62084AFC all carries absorption diode (not indicating among the figure) simultaneously, can be directly used in the connection inductive load, as relay etc.The 3KHz sinusoidal voltage signal of rotary transformer also by this interface card input, is delivered to CPU and is carried out Measurement and analysis.
When switching different processes employ pattern, can select 2 points arbitrarily on 10 points that crankshaft angles 0~360 degree is set be stop position.Shut down the fixed point operation principle as shown in Figure 3, signal on is for shutting down output, and signal off is crawl output: working condition 1 is once to shut down action; Working condition 2 is crawl actions; Working condition 3 is repeatedly to stop and the crawl action.
Comprise real-time control task unit in the central processing unit of the present utility model, detect TU task unit and intelligence adjustment TU task unit in real time.Wherein real-time control task unit is the needs according to technological process, has sequentially to forcing press output stop signal; Detecting TU task unit in real time is for the real-time stroke of accurate detected pressures machine, and travel information is fed back to CPU in real time; Intelligence adjustment TU task unit is that the difference of CPU Automatic Detection and Control signal and actual slip angle is analyzed the adjustment braking characteristic, and automatically brake parameters is regulated, to reach stroke location more accurately.
Concrete automatic principle of compensation is: cam control gear can be monitored the stopping brake characteristic of press in real time, and carries out accommodation according to the control that gradually changes automatically to stopping a train at a target point that its characteristic is in operation.Cam control gear receives the analog signal of rotary transformer by the analog input interface, on behalf of the analog signal of press physics corner value, cam control gear will carry out high-speed sampling by the A/D change-over circuit to the electrical sensing transfer characteristic of rotary transformer and be converted to 12 corresponding position digital codings, and digital coding is sent in real time among the CPU of cam control gear and handles.CPU confirms the speed of crankshaft and the current crank angle position of present forcing press according to the high frequency sampling corner value that obtains, and obtains percentage speed variation by differential algorithm.The software systems of cam control gear will require the Electronic Control of being correlated with according to preset program, i.e. the predetermined cam channel of control.When carrying out stopping a train at a target point, the multitask system of cam control gear will detect and Intelligent Adjustment System by starting state when carrying out set control, at first carry out stopping a train at a target point control according to present crankshaft speed and known brakes characteristic, the actual anglec of rotation of intelligent monitor system monitoring simultaneously, and come the present braking characteristic state of comparative analysis brakes, and the control parameter of stopping is revised adjustment according to its state and intelligence learning algorithm according to the slip angle of reality.Operate so repeatedly 3,4 times and slip angle is upgraded automatically, thereby finished the course of work that the intelligent self-learning self adaptation is adjusted.
Operation principle of the present utility model:
Cam control gear detects task system in real time by a cover and intelligence is adjusted task system, realizes setting by the mode of learning from instruction the press punching press control technology of cam control gear control.When setting, need design the physical process of technological operation, on the press equipment that has cam control gear equipment, carry out the technical process demonstration of one-period then, cam control gear will get off this process record automatically, and system becomes technical process into corresponding control programs by intelligent learning.When needs use corresponding process, just can in the data base of cam control gear, call.The learning from instruction system is mainly realized by two parts: bent axle demonstration angle detection system and artificial demonstration study interface.
Cam control gear receives the analog signal of rotary transformer by the analog input interface, the analog signal conversion that anglec of rotation sequence controller will be represented press physics corner value by the A/D change-over circuit according to the electrical sensing transfer characteristic of rotary transformer is 12 corresponding position digital codings, and digital coding is sent in real time among the CPU of cam control gear and handles.CPU is according to the high frequency sampling corner value that obtains, when the forcing press that has a cam control gear when manual driven carries out the technological operation demonstration, cam control gear just can detect and write down the corresponding crankshaft angles of pressing mold in each technology position by rotary transformer, and this has just realized bent axle demonstration angle detection system.At last, only need define with relevant setting the sampled point that is write down and just finish the technological process setting, as shown in Figure 5 at the interface at control interface.8 cover setting programs can be stored in the control interface, and every cover program has comprised different stroke of a press orders.
Described control interface uses the matrix form thin film switch to form the operating interactive interface together as input control unit and LED display floater.As shown in Figure 4, matrix switch is converted to 4 binary coding by 74HC4514AP (4 bits are changed 16 way switch amount decoding chips) with key information and gives CPU, make the staff can with CPU make an appointment mutual.CPU realizes that by P port controlling 7 short code pipe display control chips 7 segment encode alphanumeric informations show, the P port is realized the demonstration control of functional label LED light by two TD62083AF (8 passage Darlington drive circuit).Realized a complete interactive interface by above functional part.

Claims (5)

1. a high-speed blanking press cam control gear comprises: forcing press; It is characterized in that, also comprise: central processing unit is used for processing control signals; The control interface is used for inquiry and input of control commands; General I/O end is used for input and gathers signal and output control signal; Analog-digital converter, the analog signal conversion that is used for gathering is a data signal; Angular transducer is used to gather the stroke analog signal; The clutch and brake switch is used for shutting down according to the fixed point of switching signal controlled pressure machine; Signal processing circuit is used for converting the angular transducer signal to d. c. voltage signal; Described angular transducer is from forcing press acquisition angles stroke and export corresponding analog signal, through the input end of analog signal of signal processing circuit to analog-digital converter, the digital signal output end of analog-digital converter connects the sampled signal input of central processing unit by general I/O end; The control signal output of central processing unit is connected the control signal input of forcing press with electronic switch by general I/O end; The control interface connects the Interface Control port of central processing unit by data wire; Central processing unit is by the state of general I/O end I/O port controlling clutch and brake switch, and clutch and brake makes forcing press at the specified point accurate stopping.
2. a kind of high-speed blanking press cam control gear according to claim 1 is characterized in that, described angular transducer adopts the high accuracy rotary transformer.
3. a kind of high-speed blanking press cam control gear according to claim 1, it is characterized in that, be provided with intelligence in the described central processing unit and adjust TU task unit, described unit is by the control input at record controls interface, and the difference of Automatic Detection and Control signal and actual slip angle is analyzed the adjustment braking characteristic.
4. a kind of high-speed blanking press cam control gear according to claim 1 is characterized in that, selected any two angles of described central processing unit are shut down control output as fixed point.
5. a kind of high-speed blanking press cam control gear according to claim 1 is characterized in that each port of described general I/O end all is provided with optical coupling isolator.
CN2009200570813U 2009-05-22 2009-05-22 Cam control device of high-speed press Expired - Lifetime CN201534391U (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102431207A (en) * 2011-12-26 2012-05-02 江苏扬力集团有限公司 Stepless automatic regulation structure for stroke amount of pressing machine
CN102555273A (en) * 2011-12-24 2012-07-11 南京埃斯顿自动化股份有限公司 Control system used for powder press
CN104354322A (en) * 2014-09-29 2015-02-18 扬州大祺自动化技术有限公司 Electronic cam controller for mechanical pressing machine
CN109624385A (en) * 2017-10-09 2019-04-16 西克股份公司 For adjusting the safety control and method of the length of stroke of eccentric press
CN110632894A (en) * 2018-06-25 2019-12-31 南京泽荣自动化系统有限责任公司 Intelligent vertex correction method for electronic cam controller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102555273A (en) * 2011-12-24 2012-07-11 南京埃斯顿自动化股份有限公司 Control system used for powder press
CN102555273B (en) * 2011-12-24 2014-12-10 南京埃斯顿自动化股份有限公司 Control system used for powder press
CN102431207A (en) * 2011-12-26 2012-05-02 江苏扬力集团有限公司 Stepless automatic regulation structure for stroke amount of pressing machine
CN104354322A (en) * 2014-09-29 2015-02-18 扬州大祺自动化技术有限公司 Electronic cam controller for mechanical pressing machine
CN109624385A (en) * 2017-10-09 2019-04-16 西克股份公司 For adjusting the safety control and method of the length of stroke of eccentric press
CN109624385B (en) * 2017-10-09 2021-11-02 西克股份公司 Safety control device and method for adjusting stroke length of eccentric press
CN110632894A (en) * 2018-06-25 2019-12-31 南京泽荣自动化系统有限责任公司 Intelligent vertex correction method for electronic cam controller

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Granted publication date: 20100728

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