CN104354322A - Electronic cam controller for mechanical pressing machine - Google Patents
Electronic cam controller for mechanical pressing machine Download PDFInfo
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- CN104354322A CN104354322A CN201410512282.3A CN201410512282A CN104354322A CN 104354322 A CN104354322 A CN 104354322A CN 201410512282 A CN201410512282 A CN 201410512282A CN 104354322 A CN104354322 A CN 104354322A
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- angular transducer
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Abstract
The invention relates to an electronic cam controller for a mechanical pressing machine, and belongs to the technical field of pressing machine control. The electronic cam controller is mainly characterized in that an angle sensor using a linear Hall device as a signal acquisition element is switched in; an angle decoding circuit consists of a low pass filter and an AD switching circuit; signals of the angle sensor are switched into the low pass filter of the angle decoding circuit; the output of the low pass filter is switched into the AD switching circuit. The electronic cam controller adopts the linear Hall device as the signal acquisition element, and the induced magnetic field change of the Hall device is non-contact type; the electronic cam controller is free of influences of environments such as oil fouling and dust, and meanwhile in good in vibration resistance; due to almost straight-through signal transmission, the decoding part adopts low pass filtering, the anti-electromagnetic interference performance of the signals is greatly improved, and low cost and high performance are achieved.
Description
Technical field
The present invention relates to a kind of punching machine electronics cam controller (hereinafter referred to as electronic cam controller), the electric cam integrated control device of switching signal is sent according to press crankshaft position, realize cam function with electronic characteristic, belong to forcing press control technology field.
Background technology
Current normally used electronic cam controller is formed primarily of input interface circuit, display circuit, angular transducer, angle decoding circuit, single-chip microcomputer, power circuit, output interface circuit.The bent axle connection angle sensor of punching machine, angle decoding circuit carries out decoding to the signal that angular transducer inputs and draws punching machine crank position, the angle data signal of single-chip microcomputer to input carries out computing, drive interface circuit output switching signal, display circuit angles of display value indicates the position of bent axle and provides man-machine interface to arrange electric cam parameter.In current electronic cam controller, normally used angular transducer has photoelectricity incremental encoder or rotary transformer.
Adopt photoelectricity incremental encoder as the electronic cam controller of angular transducer, its photoelectricity incremental encoder exports A, B, Z tri-road incremental encoding signal, and angle decoding circuit carries out computing by counting circuit to A, B, Z input signal and draws punching machine crank position angle value.Employing photoelectric encoder is that the electronic cam controller of angular transducer exists following problem: (1) anti-dust performance is poor.Because industrial environment is severe, dust is many, simultaneously because the code-disc rotary part of photoelectricity incremental encoder is difficult to sealing, once there be dust on the photoelectric device of photoelectricity incremental encoder inside and circular code-disc, the optical signal that light receiving element detects will be made mistakes, even can't detect optical signal, the voltage pulse signal exported is made mistakes or no signal exports, cause detect angle value and press crankshaft position not corresponding, electric cam output error, to such an extent as to punching machine stroke defect or parking violation, even there is certain potential safety hazard; (2) incremental encoder draws angle by counting, and its output is not absolute position angle.Incremental encoder re-powers after a power failure again, by power down preserve incremental encoding export the counted number of pulses of A, B realize powering on after press crankshaft position corresponding to initial angle detect, if there is error the angle of primary detection and press crankshaft absolute position after power down save value is made mistakes or after power down, incremental encoder mechanical axis has rotation all can cause powering on, and then cause electronic cam controller output accuracy poor, even there is mistake.(3) because vibrations when forcing press works are large, incremental encoder anti-seismic performance is poor, causes reliability reduction, life-span minimizing.
Adopt rotary transformer as the electronic cam controller of angular transducer, its rotary transformer is made up of stators and rotators, and stator winding, as the former limit of rotary transformer, accepts excitation voltage, and excitation signal frequency adopts 1KH, 5KH, 10KH etc. usually.Rotor windings is as the secondary of transformer, induced voltage is obtained by electromagnetic coupled, the amplitude of output voltage is corresponding with detected angle, angle decoding circuit adopt special decoding chip as: AD2S80A, AD2S1200 etc. draw the absolute angle angle value corresponding with press crankshaft position.Adopt the electronic cam controller Problems existing of rotary transformer as follows: (1) industry spot electromagnetic interference is serious, and the fundamental frequency signal that rotary transformer popular at present adopts is 1KH, 5KH, 10KH etc., cause the signal serious distortion of rotary transformer when interference is severe, suppress the scope of distortion beyond special decoding circuit, cause the decoding output error occurred in short-term.(2) the special decoding circuit chip technology difficulty of rotary transformer is high at present, the integrated circuit producer of the international minority of Jin You can produce, cause special decoding circuit chip price high, simultaneously because rotary transformer production cost remains high, therefore adopt rotary transformer to be that the electronic cam controller manufacturing cost of angular transducer is high, be unfavorable for applying.
Summary of the invention
The invention provides a kind of punching machine electronics cam controller, the electronic cam controller installed at present for punching machine with photoelectricity incremental encoder be antidetonation during angular transducer, anti-dust performance is poor, poor anti jamming capability, circuit is complicated, manufacturing cost is high problem is there is during using rotary transformer as angular transducer, improve electromagnetism interference performance by the present invention, realize dust-proof, antidetonation, low cost, high-performance.
The present invention is achieved through the following technical solutions, a kind of punching machine electronics cam controller, comprise housing, angular transducer signaling interface on housing, input interface circuit in housing, display circuit, angle decoding circuit, single-chip microcomputer, power circuit, output interface circuit, it is characterized in that, described angular transducer signaling interface access take linear hall-effect device as the angular transducer of signal collecting element; Described angle decoding circuit is made up of low pass filter, A/D converter circuit, and the low pass filter in angular transducer signal access angle decoding circuit, low pass filter exports access A/D converter circuit.
Described angular transducer comprises housing, turning cylinder, printed circuit board, linear hall element, interface circuit and permanent magnet magnetic ring composition; The solid permanent magnet magnetic ring of cover on turning cylinder in housing, printed circuit board upper fixed line Hall element, linear hall element is relative with permanent magnet magnetic ring surface and be connected with the input of interface circuit.
Described printed circuit board is fixedly no less than two linear hall elements.
Described mechanical rotation axle overlaps the radial magnetic ring that solid permanent magnet magnetic ring is a pair magnetic pole.
Described single-chip microcomputer adopts Atmegaxxx or C8051Fxx or STCxx.
The present invention is by angular transducer internal mechanical turning cylinder overlapping solid permanent magnet magnetic ring, printed circuit board upper fixed line Hall element.Mechanical pressure machine crankshaft drives in the mechanical rotation axle rotation process in angular transducer, the change in linear hall element induction permanent magnet magnetic ring magnetic field, linear hall element exports analog voltage signal, export through output interface, be connected to the angular transducer signaling interface of electronic cam controller by cable.Low pass filter is to signal filtering process, and filtering high-frequency interferencing signal outputs to A/D converter circuit, converts analog voltage to angle data signal through A/D converter circuit.Single-chip microcomputer reading angular data signal in electronic cam controller, by input interface circuit, display circuit, output interface circuit, realizes the function that electronic cam controller is all.The present invention adopts linear hall-effect device to be signal collecting element, and hall device induced field is changed to cordless.The environment such as greasy dirt, dust is on it without impact, and anti-seismic performance is good simultaneously, and owing to being the Signal transmissions of near DC, decoded portion adopts LPF, and the electromagnetism interference performance of signal significantly increases, and achieves low cost, high-performance.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is angle decoding principle block diagram of the present invention;
Fig. 3 is angular transducer theory diagram of the present invention;
Fig. 4 is angular transducer frame for movement schematic diagram of the present invention.
Detailed description of the invention
Further illustrate the present invention with example by reference to the accompanying drawings, as shown in Figure 1, the present invention provides DC voltage by power module, powers to interface circuit, display circuit, angular transducer, angle decoding circuit, single-chip microcomputer.Angular transducer exports the voltage signal corresponding with turning cylinder position, angle decoding circuit carries out LPF to analog voltage signal, AD conversion, angle decoding draws the angle data signal of press crankshaft position, single-chip microcomputer reading angular data signal, and process draws relevant parameter, driver output interface circuit output cam control signal, control display circuit angles of display value and relevant parameter, the button in scanning display circuit, realizes cam parameter setting function.As shown in Figure 2, angle decoding circuit is made up of low pass filter, A/D converter circuit.Low pass filter is to signal filtering process, and filtering high-frequency interferencing signal outputs to A/D converter circuit, converts analog voltage to angle data signal through A/D converter circuit.As shown in Figure 3, the interface circuit in angular transducer, linear hall element provide operating voltage by power circuit, and linear hall element induction permanent magnet magnetic ring magnetic field produces voltage signal, exports through output interface.As shown in Figure 4, the printed circuit board 4 of angular transducer turning cylinder 2 and fixed linear Hall element 5 is arranged on bearing 1, linear hall element 5 is vertically fixed on the position near permanent magnet magnetic ring 3 on printed circuit board, and permanent magnet magnetic ring 3 is fixed in the upper of mechanical rotation axle 2.Linear hall element 5 is relative with permanent magnet magnetic ring 3 surface, separately certain angle.
Electronic cam controller employing of the present invention take linear hall-effect device as the angular transducer of signal collecting element, angle decoding circuit carries out filtering process to the signal that angular transducer inputs, analog signal is through AD conversion output angle degree data signal, single-chip microcomputer process angle data signal, controls cam output, display, cam optimum configurations.By the invention solves the dust-proof poor seismic behavior of electronic cam controller using photoelectricity incremental encoder as angular transducer, the problem that angle and absolute position are not corresponding; Solve the electronic cam controller poor anti jamming capability using rotary transformer as angular transducer, circuit is complicated, the problem that manufacturing cost is high simultaneously.
Interface circuit in the present invention is the common voltage follower of existing maturation.Low pass filter, A/D converter circuit all adopt existing mature technology.
Claims (4)
1. a punching machine electronics cam controller, comprise housing, angular transducer signaling interface on housing, input interface circuit in housing, display circuit, angle decoding circuit, single-chip microcomputer, power circuit, output interface circuit, it is characterized in that, described angular transducer signaling interface access take linear hall-effect device as the angular transducer of signal collecting element; Described angle decoding circuit is made up of low pass filter, A/D converter circuit, and the low pass filter in angular transducer signal access angle decoding circuit, low pass filter exports access A/D converter circuit.
2. punching machine electronics cam controller according to claim 1, is characterized in that, described angular transducer comprises housing, turning cylinder, printed circuit board, linear hall element, interface circuit and permanent magnet magnetic ring composition; The solid permanent magnet magnetic ring of cover on turning cylinder in housing, printed circuit board upper fixed line Hall element, linear hall element is relative with permanent magnet magnetic ring surface and be connected with the input of interface circuit.
3. punching machine electronics cam controller according to claim 1 and 2, is characterized in that, described printed circuit board is fixedly no less than two linear hall elements.
4. punching machine electronics cam controller according to claim 1 and 2, is characterized in that, described turning cylinder overlaps the radial magnetic ring that solid permanent magnet magnetic ring is a pair magnetic pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512282.3A CN104354322A (en) | 2014-09-29 | 2014-09-29 | Electronic cam controller for mechanical pressing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512282.3A CN104354322A (en) | 2014-09-29 | 2014-09-29 | Electronic cam controller for mechanical pressing machine |
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| CN104354322A true CN104354322A (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410512282.3A Pending CN104354322A (en) | 2014-09-29 | 2014-09-29 | Electronic cam controller for mechanical pressing machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706019A (en) * | 2017-01-26 | 2017-05-24 | 西安应用光学研究所 | Trunnion axis resolver detection device |
| CN110044388A (en) * | 2019-04-23 | 2019-07-23 | 刘法锐 | A kind of contactless absolute angular position sensor and application method of rotary body |
| CN112962209A (en) * | 2021-02-03 | 2021-06-15 | 武汉纺织大学 | Large-scale electric knitting needle array driving method and system for knitting machinery |
Citations (8)
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|---|---|---|---|---|
| GB2317705A (en) * | 1996-09-30 | 1998-04-01 | Cummins Engine Co Inc | Crankshaft rotation sensor |
| CN1923500A (en) * | 2006-08-16 | 2007-03-07 | 南京埃斯顿数字技术有限公司 | Mechanical pressure machine electronic control method and electronic cam control device |
| US20090189110A1 (en) * | 2008-01-30 | 2009-07-30 | Flowserve Management Company | Valve actuators having magnetic angle sensors and systems including same |
| CN201534391U (en) * | 2009-05-22 | 2010-07-28 | 华茂机械(肇庆)有限公司 | Cam control device of high-speed press |
| CN201885728U (en) * | 2010-12-03 | 2011-06-29 | 北京经纬恒润科技有限公司 | Hall motor rotor position sensor |
| CN102303419A (en) * | 2011-08-23 | 2012-01-04 | 山东理工大学 | Numerical control method for process curve of crank press |
| CN203519331U (en) * | 2013-09-05 | 2014-04-02 | 扬州锻压机床股份有限公司 | Chain axle fracture monitoring device and cam controller comprising same |
| CN204172413U (en) * | 2014-09-29 | 2015-02-25 | 扬州大祺自动化技术有限公司 | Punching machine electronics cam controller |
-
2014
- 2014-09-29 CN CN201410512282.3A patent/CN104354322A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2317705A (en) * | 1996-09-30 | 1998-04-01 | Cummins Engine Co Inc | Crankshaft rotation sensor |
| CN1923500A (en) * | 2006-08-16 | 2007-03-07 | 南京埃斯顿数字技术有限公司 | Mechanical pressure machine electronic control method and electronic cam control device |
| US20090189110A1 (en) * | 2008-01-30 | 2009-07-30 | Flowserve Management Company | Valve actuators having magnetic angle sensors and systems including same |
| CN201534391U (en) * | 2009-05-22 | 2010-07-28 | 华茂机械(肇庆)有限公司 | Cam control device of high-speed press |
| CN201885728U (en) * | 2010-12-03 | 2011-06-29 | 北京经纬恒润科技有限公司 | Hall motor rotor position sensor |
| CN102303419A (en) * | 2011-08-23 | 2012-01-04 | 山东理工大学 | Numerical control method for process curve of crank press |
| CN203519331U (en) * | 2013-09-05 | 2014-04-02 | 扬州锻压机床股份有限公司 | Chain axle fracture monitoring device and cam controller comprising same |
| CN204172413U (en) * | 2014-09-29 | 2015-02-25 | 扬州大祺自动化技术有限公司 | Punching machine electronics cam controller |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706019A (en) * | 2017-01-26 | 2017-05-24 | 西安应用光学研究所 | Trunnion axis resolver detection device |
| CN110044388A (en) * | 2019-04-23 | 2019-07-23 | 刘法锐 | A kind of contactless absolute angular position sensor and application method of rotary body |
| CN112962209A (en) * | 2021-02-03 | 2021-06-15 | 武汉纺织大学 | Large-scale electric knitting needle array driving method and system for knitting machinery |
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Application publication date: 20150218 |