CN104236765A - Piezoelectric type internal stress sensor - Google Patents
Piezoelectric type internal stress sensor Download PDFInfo
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- CN104236765A CN104236765A CN201310344835.4A CN201310344835A CN104236765A CN 104236765 A CN104236765 A CN 104236765A CN 201310344835 A CN201310344835 A CN 201310344835A CN 104236765 A CN104236765 A CN 104236765A
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Abstract
The invention relates to a piezoelectric type internal stress sensor which comprises a tensioning sleeve (1), an elastomer (2), a nut (3), sensitive elements (4), a conductive plate (5), a wire connector (6), a cable (7) and cement gum with intensity (8). When high-speed pressing equipment runs, a pressing head presses a blank downwards, so that an equipment base is deformed and generates internal stress. The sensor installed in the equipment base converts the internal stress into an electric charge signal and transmits the electric charge signal to a monitoring instrument, the monitoring instrument judges the current running condition of the equipment and the quality of the pressed blank according to a predetermined program and executes a control task, and therefore normal running of the equipment is guaranteed. The piezoelectric type internal stress sensor is simple in structure, small in size, high in precision, long in service life and convenient to install, is applied to the high-speed pressing equipment, can be used for measuring the pressing force of the pressing head accurately, is combined with the matched intelligent monitoring instrument, can greatly improve the percent of pass of workpieces, the productivity of the equipment and the automation level of factory management, prolongs the service life of the equipment and reduces labor cost.
Description
Technical field
The present invention relates to a kind of internal stress sensor, particularly a kind of a novel dynamic force snesor for measuring the change of high speed stamping plant bottom case internal stress.
Technical background
High speed stamping equipment is that obligato major equipment produced by standard component (as: screw, nut, rivet, steel ball etc.).Along with technical progress and human cost go up fast, pressing equipment is towards multistation, fast pace, automation direction development, and its work pieces process speed significantly improves, consequent device security control and production quality control problem more outstanding.In workpiece Punching Process; speed is fast, noise is large; operator is very easily tired; if do not control effectively to equipment; only with manual monitoring, often there will be because equipment attrition, pressure head breakage, mould fall the factor such as block, secondary punch die and cause a large amount of waste product to produce, even cause the device damage of hundreds of thousands unit; workpiece quality and device security rely on higher to artificial quality and technical ability, and human cost remains high.How to improve production efficiency of equipment and product quality, effectively reducing production cost is the always worried technical matters of vast standard component manufacturing enterprise.Patent of the present invention is exactly judge by the change of monitoring equipment base internal stress a kind of core component whether workpiece process is abnormal, be equipped with suitable control method and just can increase substantially plant factor, labour productivity and product quality, just effectively can reduce skill set requirements and the production cost of equipment operator.
Summary of the invention
In order to reach the object of accurate measurements plant bottom case internal stress change, technical scheme of the present invention is the direct piezo electric effect design adopting piezoceramic material, make a kind of piezoelectric type internal stress sensor, it comprises tensioning sleeve (1), elastic body (2), nut (3), sensitive element (4), conductive plate (5), electric wire connecting junction (6), cable (7) and intensity clay (8), it is characterized in that: two pieces of sensitive elements (4) bond together with adhesive glue with conductive plate (5), put into elastic body (2) otch, and with on otch, bond together with adhesive glue below, conductive plate (5) afterbody and cable (7) weld together, and cable (7) is through electric wire connecting junction (6), elastic body (2) and nut (3), electric wire connecting junction (6) nips cable (7), elastic body (2) and tensioning sleeve (1) closely cooperate, and elastic body (2) afterbody connects with nut (3) through tensioning sleeve (1), intensity clay (8) is filled with in elastic body inside.
Described tensioning sleeve (1) is tube-in-tube structure; Outside surface is stepped cylindrical, and small cylindrical surface has screw thread; Inside surface front end is conical; Centre is cylindrical; Tail end is square, closely cooperates with elastic body (2) middle part is square; Front end edge radial direction has the otch run through.
Described elastic body (2) front end is conical, radially has the otch run through; Middle part is square, coordinates with tensioning sleeve (1) uropore; Trailing exterior surface is thread cylinder, coordinates with nut (3).
Described nut (3), for cylindric, has inner hole thread, coordinates with elastic body (2); Tail end has radial slot to coordinate with frock (9); Axle center is porose to be coordinated with cable (7).
Described sensitive element (4) is piezoceramic material, squarely, and when bonding with conductive plate (5), same polarity is facing to conductive plate.
Described cable (7) is quiet noise cable, and noise is little.
Described intensity clay (8) intensity is high, insulation impedance >=1000M Ω.
Due to the utilization of technique scheme, the present invention has following advantages: when high speed stamping equipment runs, the downward stamping strip of pressure head, produces stamping press.Under the effect of stamping press, there is plastic deformation in blank, simultaneously produce opposing plastic deformation power, react on plant bottom case, plant bottom case deformed thus produces internal stress, this internal stress size and stamping press linear.Sensor is arranged on plant bottom case inside, when plant bottom case produces elastic deformation, sensor by internal stress by piezoelectric sensing element linearly proportionate relationship convert charge signal to, charge signal transmits out supply rear end monitoring instrument collection analysis through conductive plate, cable.After monitoring instrument receives sensor charge signal, judge current device ruuning situation and stamping strip part quality according to preset program, and make sorting or shutdown action.For example: pressing equipment breaks down, may cause that charging is partially long, workpiece dimension transfinites, stamping press is excessive, monitor will, according to the real-time stopping alarm of monitoring result, prevent from causing pressing equipment and burn failure; Also charging may be caused not enough, and workpiece dimension deficiency, stamping press are too small, and monitor will, according to the real-time stopping alarm of monitoring result, prevent from causing a large amount of unacceptable product output.This piezoelectric type internal stress sensor construction is simple, volume is little, precision is high, the life-span is long and easy for installation, being applied in high speed stamping equipment can Measurement accuracy ram coin power, workpiece qualification rate, equipment productivity and factory management automatization level greatly will be improved in conjunction with supporting intelligent controller, in the extension device life-span, reduce cost of labor.
Accompanying drawing explanation
Fig. 1 is the main cut-open view of the present invention.
Fig. 2 is scheme of installation of the present invention and loads schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, advantageous embodiments of the present invention is described in detail.
As shown in Figure 1, the present invention relates to a kind of piezoelectric type internal stress sensor, it comprises tensioning sleeve (1), elastic body (2), nut (3), sensitive element (4), conductive plate (5), electric wire connecting junction (6), cable (7) and intensity clay (8), it is characterized in that: two pieces of sensitive elements (4) bond together with adhesive glue with conductive plate (5), put into elastic body (2) otch, and bond together with otch above and below adhesive glue; Conductive plate (5) afterbody and cable (7) weld together, and cable (7) is through electric wire connecting junction (6), elastic body (2) and nut (3); Electric wire connecting junction (6) nips cable (7); Elastic body (2) and tensioning sleeve (1) closely cooperate, and elastic body (2) afterbody connects with nut (3) through tensioning sleeve (1); Intensity clay (8) is filled with in elastic body inside.
As shown in Figure 2, utilize special frock (9) that sensor is installed on pressing equipment inside.When high speed stamping equipment runs, the downward stamping strip of pressure head, produces stamping press.Under the effect of stamping press, there is plastic deformation in blank, simultaneously produce opposing plastic deformation power, react on plant bottom case, plant bottom case deformed thus produces internal stress, this internal stress size and stamping press linear.Sensor is arranged on plant bottom case inside, when plant bottom case produces elastic deformation, sensor by internal stress by piezoelectric sensing element linearly proportionate relationship convert charge signal to, charge signal transmits out supply rear end monitoring instrument collection analysis through conductive plate, cable.After monitoring instrument receives sensor charge signal, judge current device ruuning situation and stamping strip part quality according to preset program, and make sorting or shutdown action.For example: pressing equipment breaks down, may cause that charging is partially long, workpiece dimension transfinites, stamping press is excessive, monitor will, according to the real-time stopping alarm of monitoring result, prevent from causing pressing equipment and burn failure; Also charging may be caused not enough, and workpiece dimension deficiency, stamping press are too small, and monitor will, according to the real-time stopping alarm of monitoring result, prevent from causing a large amount of unacceptable product output.This piezoelectric type internal stress sensor construction is simple, volume is little, precision is high, the life-span is long and easy for installation, being applied in high speed stamping equipment can Measurement accuracy ram coin power, workpiece qualification rate, equipment productivity and factory management automatization level greatly will be improved in conjunction with supporting intelligent controller, in the extension device life-span, reduce cost of labor.
Content described in this instructions embodiment is only the citing of the way of realization to inventive concept; protection scope of the present invention should not be regarded as being only limitted to the concrete form that this example is stated, protection scope of the present invention also comprises those skilled in the art and conceives thinkable equivalent technology means according to the present invention.
Claims (8)
1. the present invention relates to a kind of piezoelectric type internal stress sensor, it comprises tensioning sleeve (1), elastic body (2), nut (3), sensitive element (4), conductive plate (5), electric wire connecting junction (6), cable (7) and intensity clay (8), it is characterized in that: two pieces of sensitive elements (4) bond together with adhesive glue with conductive plate (5), put into elastic body (2) otch, and bond together with otch above and below adhesive glue; Conductive plate (5) afterbody and cable (7) weld together, and cable (7) is through electric wire connecting junction (6), elastic body (2) and nut (3); Electric wire connecting junction (6) nips cable (7); Elastic body (2) and tensioning sleeve (1) closely cooperate, and elastic body (2) afterbody connects with nut (3) through tensioning sleeve (1); Intensity clay (8) is filled with in elastic body inside.
2. piezoelectric type internal stress sensor according to claim 1, is characterized in that: described tensioning sleeve (1) is tube-in-tube structure; Outside surface is stepped cylindrical, and small cylindrical surface has screw thread; Inside surface front end is conical; Centre is cylindrical; Tail end is square, closely cooperates with elastic body (2) middle part is square; Front end edge radial direction has the otch run through.
3. piezoelectric type internal stress sensor according to claim 1, is characterized in that:, for conical, radially there is the otch run through described elastic body (2) front end; Middle part is square, coordinates with tensioning sleeve (1) uropore; Trailing exterior surface is thread cylinder, coordinates with nut (3).
4. piezoelectric type internal stress sensor according to claim 1, is characterized in that: described nut (3), for cylindric, has inner hole thread, coordinates with elastic body (2); Tail end has radial slot to coordinate with frock (9); Axle center is porose to be coordinated with cable (7).
5. piezoelectric type internal stress sensor according to claim 1, it is characterized in that: described sensitive element (4) is piezoceramic material, squarely, when bonding with conductive plate (5), same polarity is facing to conductive plate.
6. piezoelectric type internal stress sensor according to claim 1, is characterized in that: described cable (7) is quiet noise cable, and noise is little.
7. piezoelectric type internal stress sensor according to claim 1, is characterized in that: described intensity clay (8) intensity is high, insulation impedance >=1000M Ω.
8. the content described in this instructions embodiment is only the citing of the way of realization to inventive concept; protection scope of the present invention should not be regarded as being only limitted to the concrete form that this example is stated, protection scope of the present invention also comprises those skilled in the art and conceives thinkable equivalent technology means according to the present invention.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310344835.4A CN104236765B (en) | 2013-08-03 | 2013-08-03 | Piezoelectric type internal stress sensor |
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| CN201310344835.4A CN104236765B (en) | 2013-08-03 | 2013-08-03 | Piezoelectric type internal stress sensor |
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| CN104236765A true CN104236765A (en) | 2014-12-24 |
| CN104236765B CN104236765B (en) | 2016-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295249A (en) * | 2021-05-26 | 2021-08-24 | 四川奇石缘科技股份有限公司 | Spliced flat-plate composite dynamic truck scale and mounting method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384802A (en) * | 2011-08-08 | 2012-03-21 | 大连理工大学 | Embedded type sensor of overall process shear stress of concrete dynamic damage |
| CN102410892A (en) * | 2011-08-05 | 2012-04-11 | 陈洪凯 | Piezoelectric type borehole stress sensor and slope stress monitoring method thereof |
| CN203519225U (en) * | 2013-08-03 | 2014-04-02 | 绵阳市奇石缘科技有限公司 | Piezoelectric internal stress sensor |
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2013
- 2013-08-03 CN CN201310344835.4A patent/CN104236765B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410892A (en) * | 2011-08-05 | 2012-04-11 | 陈洪凯 | Piezoelectric type borehole stress sensor and slope stress monitoring method thereof |
| CN102384802A (en) * | 2011-08-08 | 2012-03-21 | 大连理工大学 | Embedded type sensor of overall process shear stress of concrete dynamic damage |
| CN203519225U (en) * | 2013-08-03 | 2014-04-02 | 绵阳市奇石缘科技有限公司 | Piezoelectric internal stress sensor |
Non-Patent Citations (2)
| Title |
|---|
| 黄泽森等: "高平衡脉动压力传感器研制", 《仪表技术与传感器》 * |
| 黄泽森等: "高速冲压设备状态智能监控系统设计", 《传感器与微系统》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295249A (en) * | 2021-05-26 | 2021-08-24 | 四川奇石缘科技股份有限公司 | Spliced flat-plate composite dynamic truck scale and mounting method thereof |
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| CN104236765B (en) | 2016-12-28 |
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