CN202748181U - Stress monitoring and early warning system for cold extrusion die and pre-stress ring - Google Patents
Stress monitoring and early warning system for cold extrusion die and pre-stress ring Download PDFInfo
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- CN202748181U CN202748181U CN 201220015719 CN201220015719U CN202748181U CN 202748181 U CN202748181 U CN 202748181U CN 201220015719 CN201220015719 CN 201220015719 CN 201220015719 U CN201220015719 U CN 201220015719U CN 202748181 U CN202748181 U CN 202748181U
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Abstract
The utility model relates to the field of metal plastic processing and specifically to a stress monitoring and early warning system for a cold extrusion die and a pre-stress ring. The system comprises a stain gauge, a bridge box, a dynamic strain meter, an industrial computer, a feedback control switch and an alarm. With the extrusion die stress monitoring and early warning system provided by the utility model, strain values of the pre-stress ring of the die and changes thereof can be measured in real time, a safe stress value can be set in advance so as to achieve the purpose of real time monitoring of the pre-stress ring of the die, so stress rupture caused by too high load of the die and the pre-stress ring is prevented and safety problems resulting from cracking of the die and the pre-stress ring due to stress rupture are avoided.
Description
Technical field
The utility model relates to the Metal Forming field, is specifically related to cold extrusion die shrink ring stress monitoring early warning system.
Background technology
Metal cold extruding plastic forming technology significantly reduces the part machinery processing capacity, significantly improves inside workpiece microstructure and performance, improves the quality of workpiece, is a kind of energy-saving material-saving type advanced manufacturing technology; Plastic yield occurs and need to apply very large pressure in metal during the cold extrusion plastic forming in the normal temperature situation, and employed pressing machine all adopts higher-wattage in the extrusion process, and pressure also often reaches hundreds of tons, and cold extrusion equipment and mould have been proposed high requirement; In Cold Extrusion Process, the die of mould repeats to bear huge extrusion load, often adopt at mould structure and add cover shrink ring mode to share the excessive pressure of carrying, when the pressure load that can bear when shrink ring surpassed its limit, circle stress deformed, ftractures, until burst, on the one hand, employee around injuring on the other hand, can not effectively prevent and avoid the improper mould that causes of cold-extrusion technology and device damage.
Therefore, by the stress state of Real-time Collection monitoring shrink ring, further monitor the carrying situation of cold-extrusion technology and mould, the very first time reports to the police and makes corresponding technological measure when stress is excessive, just seems particularly important.
The utility model provides a kind of cold extrusion die shrink ring stress monitoring early warning system, it is by the stress state of shrink ring in the real time on-line monitoring Cold Extrusion Process, the load condition of monitoring cold extrusion press and mould, when its suffered load surpasses the ultimate load of setting, and alarm, and take corresponding technological measure, to guarantee the long time stability operation of cold extrusion press and equipment thereof.
Summary of the invention
The utility model purpose is to provide a kind of cold extrusion die shrink ring stress monitoring early warning system, use the resistance strain gage electrical measuring method that extrusion die and shrink ring stress are carried out real time on-line monitoring and early warning, stress rupture easily occurs because load is too high to solve mould and shrink ring, and avoid cold extrusion equipment, mould and shrink ring stress to destroy and the safety problem that causes when bursting apart.
To achieve these goals, the utility model is realized by following proposal:
A kind of cold extrusion die shrink ring stress monitoring method for early warning, it is by the stress state of shrink ring in the real time on-line monitoring Cold Extrusion Process, the load situation of monitoring cold extrusion press and mould, when its suffered load surpasses the ultimate load of setting, and alarm, and take corresponding technological measure, to guarantee the long time stability operation of cold extrusion press and equipment thereof.
A kind of cold extrusion die stress monitoring and early warning system are comprised of foil gauge, electric bridge box, dynamic strain indicator, industrial computer, FEEDBACK CONTROL switch, alarm six parts.
Described foil gauge adopts resistance strain plate, is pasted on through surface-treated shrink ring surface, and the foil gauge surface is covered with the layer of polyethylene film, and resistance strain plate links to each other with electric bridge box input end by wire in single bridge mode.
Described electric bridge box has input terminal and lead-out terminal, electric bridge box input terminal links to each other by wire with resistance strain plate, electric bridge box lead-out terminal links to each other with the input terminal of dynamic strain indicator, and the electric bridge box is produced resistance strain plate by strain resistance variations is converted to curtage signal input dynamic strain indicator.
Described dynamic strain indicator, be provided with an analog input terminal and an analog output terminal, the curtage signal is amplified processing, dynamic strain indicator analog input terminal links to each other with electric bridge box lead-out terminal by wire, dynamic strain indicator analog output terminal links to each other with the analog input terminal of industrial computer, imports the signal after amplifying into industrial computer.
Described industrial computer is that inside is provided with data collecting card and signal is processed pre-programmed industrial computer, the industrial computer outside is provided with a signal input terminal and two lead-out terminals, input terminal links to each other with dynamic strain indicator analog output terminal, the voltage signal that dynamic strain indicator is drawn imports the data collecting card of industrial computer inside into, signal conversion this moment preset program begins to start, the information that the data capture card is collected is processed, realization is expressed the instant stressing conditions of mould shrink ring with waveform and diagrammatic form, and is presented on the industrial computer screen and storage; One of them lead-out terminal of industrial computer links to each other with the input terminal of FEEDBACK CONTROL switch, and another lead-out terminal links to each other with the input terminal of alarm; When measured stress value during greater than predetermined safety value, signal is processed preset program will send alarm command, industrial computer sends current signal, passes to the FEEDBACK CONTROL switch by one of them lead-out terminal of industrial computer, passes to alarm by another lead-out terminal again.
Described FEEDBACK CONTROL switch, its input terminal links to each other with one of them lead-out terminal of industrial computer, receives the current signal that is spread out of by industrial computer, and its lead-out terminal links to each other with pressing machine shutdown switch input end, carry out feedback control function, in time stop the running of pressing machine.
Described alarm is comprised of flashlamp and loudspeaker, and its input end links to each other with a lead-out terminal of industrial computer, receives the current signal that industrial computer spreads out of, and flashlamp begins flicker, and loudspeaker sends alert song simultaneously.
The enforcement the beneficial effects of the utility model are:
1) detects in real time mould shrink ring strain value and situation of change thereof, and can set in advance the stress safety value and reach the purpose of the mould shrink ring being carried out Real-Time Monitoring and early warning, to improve the security of extrusion process.
2) the utlity model has analysis and memory function to data, waveform and chart, be convenient to follow-up analysis and research, the measuring precision is high, and detection efficiency is high, and is convenient and simple for operation easy-to-use.
3) adopt dynamic strain indicator in the utility model, measure in real time the suffered stress of shrink ring, can link to each other with many groups electric bridge box by wire, can organize the shrink ring force-bearing situation by Real-Time Monitoring by an industrial computer more, reduce cost, reduce the space, make monitoring more concentrated more convenient.
Description of drawings
Fig. 1 is the in conjunction with the embodiments one-piece construction synoptic diagram of son of the utility model;
Number description:
1. pressing machine 2. industrial computers 3. electric bridge boxes 4. dynamic strain indicators 5. signals are processed preset program 6. data acquisition cards 7. FEEDBACK CONTROL switches 8. alarms 9. flashing lamps 10. loudspeakers 11. resistance strain plates 12. punch 13. dies 14. shrink rings.
Specific embodiments
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model device is described in further details:
A kind of cold extrusion die stress monitoring and early warning system are comprised of foil gauge, electric bridge box 3, dynamic strain indicator 4, industrial computer 2, FEEDBACK CONTROL switch 7, alarm 8 six parts.
Described foil gauge adopts resistance strain plate 11, is pasted on through surface-treated shrink ring 14 surfaces, and resistance strain plate 11 surfaces are covered with the layer of polyethylene film, and resistance strain plate 11 links to each other with electric bridge box 3 input ends by wire in single bridge mode.
Described electric bridge box 3 has input terminal and lead-out terminal, electric bridge box 3 input terminals and resistance strain plate 11 link to each other by wire, electric bridge box 3 lead-out terminals link to each other with the input terminal of dynamic strain indicator 4, and electric bridge box 3 is produced resistance strain plate 11 by strain resistance variations is converted to curtage signal input dynamic strain indicator 4.
Described dynamic strain indicator 4 is provided with an analog input terminal and an analog output terminal, the curtage signal is amplified process; Dynamic strain indicator 4 analog input terminals link to each other with electric bridge box 3 lead-out terminals by wire, and dynamic strain indicator 4 analog output terminals link to each other with the analog input terminal of industrial computer 2, import the signal after amplifying into industrial computer 2.
Described industrial computer 2, its inside is provided with data collecting card 6, signal is processed preset program 5, the outside is provided with a signal input terminal and two lead-out terminals, input terminal links to each other with dynamic strain indicator 4 analog output terminals, the voltage signal that dynamic strain indicator 4 is drawn imports the data collecting card 6 of industrial computer 2 inside into, signal processing this moment preset program 5 begins to start, the information that data capture card 6 is collected is processed, realization is expressed the instant stressing conditions of mould shrink ring 14 with waveform and diagrammatic form, and is presented on industrial computer 2 screens and storage; Industrial computer 2 one of them lead-out terminal link to each other with the input terminal of FEEDBACK CONTROL switch 7, another lead-out terminal links to each other with the input terminal of alarm 8, when measured stress value during greater than predetermined safety value, signal is processed preset program 5 will send alarm command, industrial computer 2 sends current signal, pass to FEEDBACK CONTROL switch 7 by industrial computer 2 one of them lead-out terminal, pass to alarm 8 by another lead-out terminal again.
Described FEEDBACK CONTROL switch 7, its input terminal links to each other with one of them lead-out terminal of industrial computer 2, receives the current signal that is spread out of by industrial computer 2, and its lead-out terminal links to each other with pressing machine 1 shutdown switch input end, carry out feedback control function, in time stop the running of pressing machine 1.
Described alarm 7 is comprised of flashlamp 9 and loudspeaker 10, and its input end links to each other with a lead-out terminal of industrial computer 2, receives the current signal that industrial computer 2 spreads out of, and flashlamp 9 begins flicker, and loudspeaker 10 sends alert song simultaneously.
Implement the utility model and carry out following steps:
1) in the present embodiment, will push flange die 13 shrink rings 14 and carry out surface treatment, the level and smooth and polishing with surface finish, the polishing area is 3-5 times of foil gauge 11 areas; Resistance strain plate 11 is pasted shrink ring 14 polishing zones, cover the layer of polyethylene film on the resistance strain plate 11; The wire bonds of resistance strain plate 11 is firm, and the wire other end connects the input terminal of electric bridge box 3; Electric bridge box 3 lead-out terminals are linked to each other with the analog input terminal of dynamic strain indicator 4; Dynamic strain indicator 4 analog output terminals are linked to each other with the analog input terminal of industrial computer 2; Industrial computer 2 one of them lead-out terminal are linked to each other with the input terminal of FEEDBACK CONTROL switch 7; Another lead-out terminal of industrial computer 2 is linked to each other with the input terminal of alarm 8.
2) plugged starts industrial computer 2 and dynamic strain indicator 4, and the stress safety value is set; Starting pressure machine 1, when pressing machine 1 drives punch 12 extruding flange workpiece, the extrusion stress that the plastic yield of flange workpiece produces is transferred to die 13 and shrink ring 14, this moment, shrink ring 14 was owing to deformation appears in the stress that is squeezed, cause resistance strain plate 11 that deformation occurs, this moment, the resistance of resistance strain plate 11 changed, this resistance signal is converted to the curtage signal by electric bridge box 3, pass to again dynamic strain indicator 4, by dynamic strain indicator 4 signal is amplified processing, import the data collecting card 6 in the industrial computer 2 into, signal is processed preset program 5 and is brought into operation, the information that data capture card 6 is collected is processed, ess-strain information is presented on industrial computer 2 screens with waveform and diagrammatic form, and to storing after the data analysis.
3) when die shrink ring 14 force value of bearing reaches the strain safety value, signal is processed preset program 5 will send alarm command, industrial computer 2 sends current signal, a lead-out terminal by industrial computer 2 passes to FEEDBACK CONTROL switch 7, pass to alarm by another lead-out terminal again, pressing machine 1 shuts down, simultaneously flashlamp 9 flickers, loudspeaker 10 sends alert song, and this moment, the workman can in time adjust station or extrusion process.
By above implementing measure, the utility model has effectively reached the purpose of mould and shrink ring 14 being carried out Real-Time Monitoring, has guaranteed the normal use of mould and shrink ring 14 and operating personnel's safety.
Claims (1)
1. cold extrusion die and shrink ring stress monitoring early warning system, it is characterized in that: described system is comprised of foil gauge, electric bridge box, dynamic strain indicator, industrial computer, FEEDBACK CONTROL switch and alarm six parts, described foil gauge adopts resistance strain plate, be pasted on through surface-treated shrink ring surface, the resistance strain plate surface is covered with the layer of polyethylene film, and resistance strain plate links to each other with electric bridge box input end by wire in single bridge mode; Described electric bridge box has input terminal and lead-out terminal, electric bridge box input terminal links to each other by wire with resistance strain plate, electric bridge box lead-out terminal links to each other with the input terminal of dynamic strain indicator, and the electric bridge box is produced resistance strain plate by strain resistance variations is converted to curtage signal input dynamic strain indicator; Described dynamic strain indicator, be provided with an analog input terminal and an analog output terminal, the curtage signal is amplified processing, dynamic strain indicator analog input terminal links to each other with electric bridge box lead-out terminal by wire, dynamic strain indicator analog output terminal links to each other with the analog input terminal of industrial computer, imports the signal after amplifying into industrial computer; The industrial computer that described industrial computer is processed for carrying out data acquisition and signal, the industrial computer outside is provided with a signal input terminal and two lead-out terminals, input terminal links to each other with dynamic strain indicator analog output terminal, and the voltage signal that dynamic strain indicator is drawn imports the data collecting card of industrial computer inside into; One of them lead-out terminal of industrial computer links to each other with the input terminal of FEEDBACK CONTROL switch, and another lead-out terminal links to each other with the input terminal of alarm; Described FEEDBACK CONTROL switch, its input terminal links to each other with one of them lead-out terminal of industrial computer, receives the current signal that is spread out of by industrial computer, and its lead-out terminal links to each other with pressing machine shutdown switch input end; Described alarm is comprised of flashlamp and loudspeaker, and its input end links to each other with a lead-out terminal of industrial computer, receives the current signal that industrial computer spreads out of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220015719 CN202748181U (en) | 2012-01-14 | 2012-01-14 | Stress monitoring and early warning system for cold extrusion die and pre-stress ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220015719 CN202748181U (en) | 2012-01-14 | 2012-01-14 | Stress monitoring and early warning system for cold extrusion die and pre-stress ring |
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| Publication Number | Publication Date |
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| CN202748181U true CN202748181U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220015719 Withdrawn - After Issue CN202748181U (en) | 2012-01-14 | 2012-01-14 | Stress monitoring and early warning system for cold extrusion die and pre-stress ring |
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| CN (1) | CN202748181U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564659A (en) * | 2012-01-14 | 2012-07-11 | 江苏舒恒管夹制造有限公司 | Stress monitoring and early warning method and system for prestress ring of cold extrusion mold |
| CN103743375A (en) * | 2013-12-23 | 2014-04-23 | 石家庄铁道大学 | Rapid testing method for invert strain of existing tunnel |
-
2012
- 2012-01-14 CN CN 201220015719 patent/CN202748181U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564659A (en) * | 2012-01-14 | 2012-07-11 | 江苏舒恒管夹制造有限公司 | Stress monitoring and early warning method and system for prestress ring of cold extrusion mold |
| CN102564659B (en) * | 2012-01-14 | 2014-09-10 | 江苏舒恒管夹制造有限公司 | Stress monitoring and early warning method and system for prestress ring of cold extrusion mold |
| CN103743375A (en) * | 2013-12-23 | 2014-04-23 | 石家庄铁道大学 | Rapid testing method for invert strain of existing tunnel |
| CN103743375B (en) * | 2013-12-23 | 2016-07-06 | 石家庄铁道大学 | A kind of haved project lawer inverted arch strain method for rapidly testing |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130220 Effective date of abandoning: 20140910 |
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| RGAV | Abandon patent right to avoid regrant |